OEM-quality trackpad replacement (without flex cable) for MacBook Air 13″ (Model A1932, 2018–2019) in Gold finish—engineered for precise Force Touch response, smooth multi-touch gestures, and perfect color-matched integration with the original chassis. Compatible With: MacBook Air 13-inch (2018 & 2019, Model A1932, Model Identifiers MacBookAir8,1) with Intel Core i5/i7 processors. Part Type: Trackpad only—does not include the flex cable, Taptic Engine, or mounting hardware. Designed for technicians who will reuse the original internal components. Finish: Gold—specifically matched to the Gold variant of the A1932 MacBook Air for seamless aesthetic continuity. Force Touch Support: Fully compatible with pressure-sensitive input and haptic feedback when paired with the original Taptic Engine and logic board—ensuring full macOS gesture functionality (e.g., Force Click, Look Up, pressure-sensitive navigation). Precision Build: Smooth glass surface with exact curvature, texture, and micro-click mechanism matching Apple’s original design for consistent tracking accuracy and tactile feel. Installation Requirements: Requires full bottom case disassembly and careful transfer of the original flex cable and Taptic Engine. Adhesive must be applied precisely to maintain structural integrity and sensor alignment. Recommended for professional or experienced repair technicians only.
The Anyuse Portable Monitor 15.6″ FHD USB-C offers clear visuals in a slim and lightweight design. It provides sharp Full HD quality for work and entertainment. The screen shows bright colors and strong detail. This makes movies, games, and documents look smooth and clear. Moreover, the Anyuse Portable Monitor FHD USB-C connects easily through a single USB-C cable. This cable carries both power and video. It removes the need for extra chargers or adapters. This makes setup fast and simple for all users. In addition, the monitor works with laptops, tablets, phones, and gaming consoles. This wide compatibility helps you use the screen anywhere. You can work on the go, or play games during travel. It gives you more freedom and flexibility. Furthermore, the Anyuse Portable Monitor 15.6″ FHD USB-C features a slim frame with a modern look. It fits easily inside backpacks and travel bags. The lightweight build makes it comfortable to carry daily. This makes it ideal for students and professionals. Also, the monitor includes built-in speakers for better convenience. They provide clear sound for videos and calls. The screen also offers eye-care features that reduce strain. This helps you use the monitor for long hours with comfort. The stand cover of the Anyuse Portable Monitor FHD USB-C protects the screen during travel. It also works as a foldable stand. You can place the monitor at comfortable angles for work or play. This improves your overall experience. Overall, the Anyuse Portable Monitor 15.6″ FHD USB-C delivers portability, quality, and comfort in one device. It helps you stay productive anywhere. It also makes entertainment more enjoyable. This monitor is perfect for travel, work, study, and gaming. Specifications: Display : 15.6″ Resolution : FHD 1920×1080 Refresh Rate : 60Hz Response Time : 5ms
Philips Evnia 34M2C5500 34-inch ultrawide gaming monitor delivers immersive and ultra-smooth performance for gaming and multitasking. It focuses on high refresh rate, curved design, and wide QHD clarity for an engaging experience. Additionally, it features a 34-inch Fast VA panel with UltraWide QHD resolution (3440 × 1440). This resolution provides a wider field of view, so it improves both gaming immersion and productivity workflows. Moreover, it supports up to a 180Hz refresh rate with 0.5ms Smart MBR response time. As a result, it delivers very smooth motion and reduces blur in fast-paced gameplay. The monitor uses a 1500R curved design. Therefore, it enhances immersion by wrapping visuals around your natural field of view. In addition, it supports VESA DisplayHDR 400. This improves brightness, contrast, and color depth, so visuals appear more vivid and lifelike. Furthermore, it includes Adaptive Sync and low input lag. These features reduce tearing and improve responsiveness for competitive gaming. It also offers gaming tools such as Smart Crosshair and SmartImage modes. So it helps improve aiming accuracy and visual tuning during gameplay. Philips Evnia 34M2C5500 34-inch ultrawide gaming monitor provides immersive visuals, high-speed performance, and advanced gaming features for serious players. Specifications: 34-inch Fast VA panel with 3440 × 1440 UltraWide QHD resolution 180Hz refresh rate for ultra-smooth gaming 0.5ms Smart MBR response time for reduced motion blur 1500R curved design for immersive viewing DisplayHDR 400 with Adaptive Sync support
The Samsung Crystal UHD U8000F 55″ 4K TV UA55U8000FUXTW uses a 55-inch LCD panel with 3840 × 2160 resolution. It delivers standard 4K output for everyday TV, streaming, and console use. Samsung uses the Crystal Processor 4K for image processing and upscaling. As a result, lower-resolution content converts closer to 4K quality on the screen. In addition, the TV supports HDR10 and HDR10+, which improve contrast between bright and dark areas. The display runs at a 60 Hz refresh rate. Also, Motion Xcelerator reduces blur during fast scenes such as sports and action content. Samsung equips the TV with Tizen OS. Therefore, users access streaming apps, SmartThings integration, and built-in smart functions through a simple interface. Connectivity includes HDMI ports, USB ports, Wi-Fi, Bluetooth, Ethernet LAN, and optical audio output. In addition, the TV supports ALLM for basic gaming response performance. This model focuses on 4K resolution, standard HDR support, and essential smart TV features without advanced gaming or local dimming systems. Specifications: 55-inch LCD panel with 3840 × 2160 4K UHD resolution Crystal Processor 4K with upscaling support HDR10 and HDR10+ compatibility 60 Hz refresh rate with Motion Xcelerator Tizen OS with HDMI, USB, Wi-Fi, Bluetooth, Ethernet connectivity
Looking for a top-notch monitor to elevate your viewing experience? The MSI Modern MD272QXP 27″ 100Hz monitor might be just what you need. It offers a blend of stunning visuals, smooth performance, and a sleek design. Firstly, let’s dive into the display quality. This 27-inch monitor boasts a QHD resolution, delivering crisp and clear images. Whether you’re working on detailed projects or enjoying your favorite movies, every detail comes to life with impressive clarity. The 100Hz refresh rate is another standout feature. It ensures smooth and fluid visuals, making it perfect for gaming and fast-paced videos. Say goodbye to screen tearing and hello to a seamless viewing experience. Moreover, the MSI Modern MD272QXP monitor is designed with eye comfort in mind. It includes features like anti-flicker technology and blue light reduction. These features help reduce eye strain, making long hours in front of the screen more comfortable. In addition to its performance, the monitor’s design is sleek and modern. The slim bezels and elegant stand make it a stylish addition to any workspace or home setup. It doesn’t just perform well; it looks good doing it. Connectivity is also a breeze with this monitor. It comes equipped with multiple ports, including HDMI and USB-C, allowing you to connect various devices effortlessly. This flexibility ensures you can use the monitor with all your gadgets. Furthermore, the MSI Modern MD272QXP is easy to set up and adjust. The stand offers tilt, swivel, and height adjustments, so you can find the perfect viewing angle. Whether you’re working, gaming, or watching movies, you’ll enjoy optimal comfort. In conclusion, the MSI Modern MD272QXP 27″ 100Hz monitor is a fantastic choice for anyone looking to enhance their viewing experience. Its combination of high resolution, smooth performance, eye-friendly features, and sleek design makes it a top pick. Upgrade your monitor today and enjoy the difference! Specifications: Display : 27″ IPS Resolution : 2560×1440 (WQHD) Refresh Rate : 100Hz Response Rate : 1ms (MPRT)
Genuine Apple MacBook Pro 16″ (A2141) Retina display assembly—professionally removed from original units and tested for full functionality. Ideal for high-quality repairs with true OEM performance and clarity. Model Compatibility: Fits MacBook Pro 16-inch (2019 model, A2141) only. 100% Original Apple Display: Not a copy or aftermarket part—this is an authentic Apple Retina display assembly carefully pulled from used or refurbished MacBook Pro units. Stunning Retina Display: 16-inch LED-backlit screen with 3072 x 1920 resolution, P3 wide color, True Tone technology, and high brightness for crisp, lifelike visuals. Complete Assembly Included: Comes with front glass, LCD panel, integrated 720p FaceTime HD camera, ambient light sensor, and full bezel—ready for installation. Rigorously Inspected: Each unit is tested for dead pixels, backlight uniformity, color accuracy, and physical condition to ensure reliable performance. “Pulled” Condition: Removed from a genuine MacBook Pro—fully functional with OEM quality, but shows signs of prior use (no cracks or major blemishes). Perfect for Professional Repairs: Trusted by technicians and refurbishers who demand factory-level display quality and compatibility.
COMPACT AND WIRELESS Enjoy the freedom of wireless with this versatile combo. The compact keyboard is equipped with a number pad ideal for data entry, calculations and navigation, so you can get more work done in less space. The ambidextrous mouse delivers smooth tracking and scrolling, for easy navigation -at home or at work. COMPACT AND WIRELESS Enjoy the freedom of wireless with this versatile combo. The compact keyboard is equipped with a number pad ideal for data entry, calculations and navigation, so you can get more work done in less space. The ambidextrous mouse delivers smooth tracking and scrolling, for easy navigation -at home or at work. Height: 112 mm Width: 381 mm Depth: 17.78 mm Weight: 320 g Height: 107 mm Width: 60 mm Depth: 40 mm Weight: 112 g 10-Key Number pad Music Controls Up to 5 million keystrokes (excludes number lock key) Key type: Deep-profile Spill-resistant 2Tested under limited conditions (maximum of 60 ml liquid spillage). Do not immerse the keyboard in liquid. 2 AAA batteries (Alkaline Batteries) Sensor Technology: Smooth Optical Tracking Number of Buttons: 3 (Left/Right-click, Middle click) Scrolling: line-by-line Scroll Wheel: Yes, optical 2 AA batteries (Alkaline batteries) Windows® 10,11 or later ChromeOS An available USB ports
The Samsung Odyssey G3 24″ 180Hz Gaming Monitor delivers smooth gameplay with a high refresh rate. It ensures ultra-fast performance for competitive gaming. The 180Hz refresh rate reduces motion blur, making fast-paced action more fluid. Every frame appears crisp and clear, giving players an edge in fast-action games. With a 1ms response time, this gaming monitor eliminates lag and ghosting. It provides instant reactions, helping gamers stay ahead in intense battles. The quick response ensures accurate movements and smooth transitions between scenes. The Full HD 1920×1080 resolution offers sharp and detailed visuals. Every image appears clear, enhancing the gaming experience. The high contrast ratio improves depth and realism in darker scenes. Whether exploring dark landscapes or engaging in bright battlefields, the visuals remain immersive. The Samsung Odyssey G3 24″ 180Hz Gaming Monitor features AMD FreeSync Premium for tear-free gaming. It synchronizes the monitor’s refresh rate with the graphics card. This reduces screen tearing and stuttering, ensuring smooth gameplay. Even in demanding scenes, the visuals stay seamless. Designed with an ergonomic stand, this monitor offers height adjustment, tilt, and swivel options. Gamers can adjust the screen for maximum comfort during long gaming sessions. The slim bezel design creates a modern and immersive viewing experience. The monitor includes multiple connectivity options, including HDMI and DisplayPort. This ensures compatibility with gaming consoles, PCs, and other devices. The versatile connectivity makes it a great choice for any gaming setup. The Samsung Odyssey G3 24″ 180Hz Gaming Monitor is perfect for gamers seeking speed, clarity, and immersion. Its fast refresh rate, sharp visuals, and ergonomic design make it an excellent choice. Every game feels smoother, sharper, and more immersive. Specifications: Display : 24″ VA Resolution : FHD (1,920 x 1,080) Refresh Rate : 180Hz Response Rate : 1ms
The Samsung 32DM801 32″ M8 UHD 4K Smart Monitor is a stunning addition to any workspace or entertainment setup. This 32-inch UHD monitor brings impressive 4K resolution, delivering crisp, lifelike visuals that elevate your viewing experience. Designed with versatility in mind, the Samsung M8 Smart Monitor is perfect for both work and play. The large 32-inch display provides ample screen space for multitasking, making it ideal for professionals. The 4K UHD resolution enhances clarity, allowing you to view documents, images, and videos with fine detail. The Samsung 32DM801 32″ M8 UHD 4K Smart Monitor is also a smart entertainment hub. With built-in streaming apps like Netflix, YouTube, and Apple TV, you can enjoy your favorite shows without needing an external device. The monitor has speakers integrated for an immersive audio experience, so you don’t have to worry about extra equipment. This monitor’s sleek and slim design fits perfectly into any modern setup. It comes with a height-adjustable stand that lets you customize the screen position to reduce strain on your neck and eyes. With USB-C connectivity, you can quickly connect devices and charge them, making it a convenient all-in-one solution. Setting up the Samsung 32DM801 32″ M8 UHD 4K Smart Monitor is simple. The smart monitor is compatible with multiple devices and operating systems, providing seamless functionality. For anyone looking to upgrade their workspace or home entertainment, this monitor combines functionality, style, and quality. Specifications: Display : 32″ VA Panel Resolution : 4K (3,840 x 2,160) Refresh Rate : 60Hz Response Rate : 4ms GTG
A versatile wireless 2D barcode scanner with desk stand—Beurotika BS104WS supports auto-scan, continuous, and manual modes, with up to 200 scans per second and a 2000mAh rechargeable battery for all-day use. The Beurotika BS104WS is a high-performance wireless 2.4GHz 2D barcode scanner designed for retail, warehouse, logistics, and office environments. It comes with a convenient desktop stand for hands-free operation and features a 32-bit high-speed processor for fast, accurate decoding of 1D and 2D barcodes—including QR Code, Data Matrix, PDF417, and more Three scanning modes: Auto-scan, continuous scan, and manual trigger—ideal for different workflow needs Scanning speed: Up to 200 scans per second for rapid data capture Wireless range: Reliable 2.4GHz connection (via USB dongle) for cord-free mobility Built-in battery: 3.7V 2000mAh lithium-ion battery offering up to 16 hours of continuous use Ergonomic handheld design with desk stand for flexible countertop or portable use Plug-and-play setup via USB receiver—no drivers required for most systems
GAMDIAS AURA GK2 White & Black | Full-Size Wired Mechanical Keyboard | Tactile Mechanical Switches | Multi-Colour Backlit Switches | 10 Built-in Hot Keys | 50 Million Switch Lifecycle | USB-A About this item Gamdias AURA GK2 is a wired mechanical keyboard designed to complement your gaming experience and skills. We have added multiple functionality features to make the AURA GK2 a high-performance keyboard. Each key has a 50 Million Key Press Lifecycle over the standard 20 million. This enables the keyboard to stay efficient and provide accurate feedback even after a longer use period. The Keyboard has been designed to provide a highly responsive and easily adaptable gaming experience with its Tactile Mechanical Keyboard while complimenting your setup with dual color keycaps. The Keyboard comes in the White & Black color to easily blend in with your aesthetic environment and complement your professional or gaming setup. The keyboard has a multi-colour backlight and 9 Built-In Lighting effects. Dimensions: 29.2 x 10.2 x 4 cm; 519 Grams
View Sonic Monitor VA2432-h 24” 1080p IPS Monitor HDMI and VGA Input SuperClear® IPS Technology for rich colors at wide angles 75Hz Refresh rate delivers fluid visuals Eye-Care technology for comfortable viewing Eco-mode for low energy consumption Superior ViewMode color rendering options VESA wall-mountable Specifications: View Sonic Monitor VA2432-h 24” 1080p IPS Monitor HDMI and VGA Input SuperClear® IPS Technology for rich colors at wide angles 75Hz Refresh rate delivers fluid visuals Eye-Care technology for comfortable viewing 1 Year Warranty
SanDisk 1TB Portable SSD - Up to 800MB/s, USB-C, USB 3.2 Gen 2, Updated Firmware - External Solid State Drive - SDSSDE30-1T00-326 SanDisk 1TB Portable SSD – Up to 800MB/s, USB-C, USB 3.2 Gen 2, Updated Firmware – External Solid State Drive – SDSSDE30-1T00-326 About this item Solid state performance with up to 800MB/s read speeds in a portable drive. (Based on internal testing; performance may be lower depending on host device, interface, usage conditions, and other factors. 1 MB = 1,000,000 bytes.) Back up your content and memories on a storage solution that fits seamlessly into your mobile lifestyle. Take it with you on your adventures—up to a two-meter drop, protection means this durable drive can take a beating. (Based on internal testing.) Secure it to your belt loop or backpack for extra peace of mind thanks to the tough rubber hook. From SanDisk, a brand professional photographers trust to take on assignments.
The LG UltraFine 27″ 4K UHD IPS LED Monitor offers stunning picture quality with vibrant colors and sharp details. It is perfect for professionals and creatives who need accurate visuals. With 4K UHD resolution (3840 x 2160), this monitor delivers four times the detail of Full HD screens. The IPS technology ensures wide viewing angles, making images look great from any position. This LG UltraFine 27-inch monitor supports 99% of the sRGB color gamut, providing true-to-life colors. It is ideal for photo editing, video production, and graphic design. The USB-C and DisplayPort connectivity make it easy to connect to laptops, desktops, and other devices. With USB-C charging, you can power your laptop while using the monitor, reducing cable clutter. The LG UltraFine 27″ 4K UHD IPS LED Monitor features a sleek, modern design that fits any workspace. Its adjustable stand allows you to tilt and change the height for comfortable viewing. The anti-glare screen reduces reflections, making it easier to work in bright environments. The 5ms response time ensures smooth visuals, perfect for fast-moving content. This 4K UHD monitor is also great for entertainment. Enjoy watching movies, streaming videos, or playing games with crystal-clear detail. The HDR10 support enhances brightness and contrast for a more immersive experience. The built-in speakers provide decent audio, so you don’t always need external speakers. With Flicker-Free technology and a Blue Light filter, this LG UltraFine monitor reduces eye strain, making it ideal for long work sessions. The VESA compatibility allows for easy wall mounting or monitor arm installation. Whether you are a creative professional or a multitasker, this monitor boosts productivity and enhances visual experience. Specifications: Display : 27″ IPS Resolution : 3840 x 2160 Refresh Rate : 60Hz Response Rate : 5ms
The Samsung S3 Essential (D362) 27″ Full‑HD VA Curved Monitor (LS27D362GAMXUE) offers a large curved screen with a 100 Hz refresh rate for smoother motion in games and videos. Additionally, the VA panel produces deep contrast with wide viewing angles for everyday computing, entertainment, and casual gaming. The monitor also supports Game Mode to optimize color and image contrast for more vivid scenes. Moreover, advanced eye comfort technologies such as Eye Saver Mode and flicker‑free operation help reduce eye strain during long sessions. Therefore, it supports extended use for work or entertainment without discomfort. The curved design enhances immersion and helps minimize peripheral distractions. Furthermore, connectivity includes HDMI and VGA ports for easy connection to PCs and other devices. The monitor also includes a headphone jack for audio output. It comes with a stand that allows tilt adjustment, and it supports VESA wall mounting for flexible setups. The monitor is backed by a three‑year warranty for peace of mind. Specifications: 27″ curved VA panel with Full HD (1920 × 1080) resolution for clear visuals 100 Hz refresh rate for smoother motion in games and videos Game Mode optimizes color and contrast for more vivid scenes Eye Saver Mode and flicker‑free technology reduce eye strain HDMI and VGA connectivity plus headphone jack for flexible connections
The ViewSonic VA2710-mh 27″ 60Hz Monitor brings stunning visuals to your desk. With its 27-inch Full HD display, you can enjoy vibrant colors and sharp details, perfect for work, entertainment, or gaming. This monitor features a sleek and modern design, making it a stylish addition to any workspace. The slim bezels provide a clean and uncluttered look, enhancing your viewing experience. The ViewSonic VA2710-mh offers versatile connectivity options, including HDMI and VGA inputs. This makes it easy to connect your computer, laptop, or gaming console, ensuring compatibility with various devices. With a 60Hz refresh rate, the ViewSonic VA2710-mh delivers smooth and fluid visuals. Whether you’re watching movies, playing games, or working on graphic design, you’ll appreciate the clarity and responsiveness of this monitor. The SuperClear IPS panel technology provides consistent brightness and accurate colors from any viewing angle. This means you can enjoy the same high-quality visuals, whether you’re sitting directly in front of the screen or off to the side. The ViewSonic VA2710-mh is designed for comfort and productivity. It features flicker-free technology and a Blue Light Filter, reducing eye strain during extended viewing sessions. This makes it an ideal choice for those who spend long hours in front of their screens. In conclusion, the ViewSonic VA2710-mh 27″ 60Hz Monitor combines stunning visuals, versatile connectivity, and a sleek design for an exceptional viewing experience. Upgrade your setup today and enjoy vibrant and clear visuals with the ViewSonic VA2710-mh monitor. Specifications: Display : 27″ IPS Resolution : FHS 1920×1080 Refresh Rate : 60Hz Response Rate : 5ms
Apple Magic Mouse: Wireless, Bluetooth, Rechargeable. Works with Mac or iPad; Multi-Touch Surface - White (Pre-Owned) Apple Magic Mouse: Wireless, Bluetooth, Rechargeable. Works with Mac or iPad; Multi-Touch Surface – White (Pre-Owned) About this item WIRELESS, RECHARGEABLE CONVENIENCE — Magic Mouse connects wirelessly to your device via Bluetooth. And the rechargeable internal battery means no loose batteries to replace. WORKS WITH MAC OR IPAD — It’s ready to go right out of the box and pairs quickly with your Mac or iPad so you can get to work right away. SWIPE AND SCROLL ON THE MULTI-TOUCH SURFACE — The Multi-Touch surface allows you to perform simple gestures such as swiping and scrolling. And an optimized foot design lets Magic Mouse glide smoothly across your desk. GO WEEKS WITHOUT CHARGING — The incredibly long-lasting internal battery will power your Magic Mouse for about a month or more between charges. Comes with a woven USB-C to Lightning Cable that lets you pair and charge by connecting to a USB-C port on your Mac or iPad. SYSTEM REQUIREMENTS — Requires a Bluetooth-enabled Mac with OS X 10.11 or later or an iPad with iPadOS 13.4 or later.
AOC Q32V3S/WS 31.5-inch QHD monitor delivers sharp visuals and a clean design for productivity, media, and light gaming. It focuses on large-screen clarity, accurate color, and comfortable daily use. Additionally, it features a 31.5-inch IPS panel with QHD resolution (2560 × 1440). This resolution provides fine detail and extra workspace, so it improves multitasking and visual clarity. Moreover, it uses IPS technology. As a result, it delivers consistent colors and wide viewing angles from almost any position. The monitor supports a 4ms GtG response time. Therefore, it keeps motion reasonably smooth for general use and casual entertainment. In addition, it includes Adaptive Sync support. This reduces screen tearing and stuttering, so visuals stay smoother during compatible gaming and video playback. Furthermore, it includes Low Blue Light and Flicker-Free technologies. So it helps reduce eye strain during long working or study sessions. AOC Q32V3S/WS 31.5-inch QHD monitor provides a large, sharp display with comfort-focused features for everyday productivity and entertainment. Check out other option here! Specifications: 31.5-inch IPS panel with QHD 2560 × 1440 resolution Wide viewing angles with consistent color accuracy 4ms GtG response time for smooth visuals Adaptive Sync for reduced tearing and stuttering Low Blue Light and Flicker-Free eye comfort tech
REMAX RB-M61 SPEAKER 5.4 CRIMSOY SERIES PORTABLE WIRELESS SPEAKER WITH LIGHTS (140W) Product name: RB-M61 Crimson Series Portable Wireless Speaker with Lights Wireless version: V5.4 Transmission distance: 12M Frequency response: 40HZ-18KHZ Impedance: 4O Rated power: 140W Battery capacity: 24000mAH Input: 5V 3A Drive unit: 103mm*2+57mm*2 Standby time: 6 months Playtime: 20h Product size: 343mm*120*244.3mm Product color: Black, Silver Charging time: 8 hours Product net weight: 4.56KG
lenovo battery L18C3PF2 Laptop Battery Compatible with Lenovo Ideapad L3-15IML05 L340-15API L340-15IWL L340-17API L340-17IWL L340-15API/L340-15IWL Touch Series 5B10T03401 L18M3PF2 L18L3PF1 L18D3PF1 11.25V 36Wh About this item 【Battery type】Li-ion. Voltage: 11.25V. Capacity: 36Wh 3320mAh . 【Compatible Part Number】L18C3PF2 5B10T03401 5B10W67302 L18M3PF2 5B10T03402 5B10W67367 5B10T03404 L18D3PF1 5B10W67278 5B10T03400 L18L3PF1 5B10W67198 5B10T03403 . 【Replacement For Laptop】Lenovo V155-15API V340-17IWL, IdeaPad L3-15IML05, Ideapad L340-15API L340-15IWL L340-17API L340-17IWL L340-15IWL Touch L340-15API Touch Series Notebook. 【Connector】Before placing your order, Please refer to the picture and check it. Because the products produced by different factories will have differences in size, cable length, interface, etc.
