Are you searching for the ultimate gaming monitor? Look no further! The MSI G274QPF-E2 27″ 180Hz Gaming Monitor is designed to take your gaming experience to the next level. With its exceptional features, it’s perfect for both casual and competitive gamers. Firstly, let’s talk about the stunning display. The MSI G274QPF-E2 features a 27-inch screen that delivers crystal-clear images. Enjoy every detail with a high resolution that makes your games come to life. Whether you’re exploring vast open worlds or engaging in fast-paced action, this monitor ensures an immersive experience. The standout feature of this monitor is its 180Hz refresh rate. Say goodbye to screen tearing and motion blur. With a high refresh rate, every frame is displayed smoothly, giving you a competitive edge in fast-paced games. Your gameplay will be seamless, and your reactions quicker. In addition, the MSI G274QPF-E2 boasts a fast response time. This means less ghosting and clearer visuals during intense gaming sessions. Every movement on screen is sharp and precise, enhancing your overall gaming experience. Moreover, the monitor supports Adaptive Sync technology. This feature synchronizes the refresh rate of the monitor with your GPU, reducing screen stuttering and tearing. Enjoy a fluid gaming experience, free from distractions. The MSI G274QPF-E2 is also designed with gamers in mind. It has a sleek, modern design that fits perfectly in any gaming setup. The adjustable stand allows you to find the perfect viewing angle for extended gaming sessions. In conclusion, the MSI G274QPF-E2 27″ 180Hz Gaming Monitor offers stunning visuals, smooth performance, and advanced features. Elevate your gaming experience with this top-of-the-line monitor. Get ready to immerse yourself in the world of gaming like never before! Specifications: Display : 27″ Rapid IPS Resolution : 2560 x 1440 (WQHD) Refresh Rate : 180Hz Response Rate : 1ms GTG
AOC G2490VX 24″ FreeSync Display Specifications : Model name G2490VX Panel 23.8″ (VA) Pixel Pitch (mm) 0.2745 (H) × 0.2745 (V) Effective Viewing Area (mm) 527.04 (H) × 296.46 (V) Brightness (typical) 350 cd/m² (typical) Contrast Ratio 3500 : 1 (Typical) 80 Million : 1 (DCR) Response Time 1ms (MPRT) Viewing Angle 178° (H) / 178° (V) (CR > 10) Color Gamut sRGB 126% (CIE1931) / DCI -P3 87% (CIE1976) Color Accuracy Delta E < 2 Optimum Resolution 1920 × 1080 @ 144Hz – DisplayPort, HDMI Display Colors 16.7 Million Signal Input HDMI 1.4 × 1, DisplayPort 1.2 × 1 HDCP Version HDMI: 1.4 / DisplayPort: 1.4 USB Hub no Power Supply 100 – 240V ~ 1.5A, 50 / 60Hz Power Consumption (typical) 22W Speakers no Line in & Earphone Earphone Wall-Mount 100mm x 100mm Adjustable Stand Tilt: -5° ~ 23° Product without Stand (mm) 322.9 (H) × 541.2 (W) × 47 (D) Product with Stand (mm) 411 (H) × 541.2 (W) × 199.6 (D) Product without Stand (kg) 2.88 Product with Stand (kg) 3.54 Cabinet Color Black & Red Regulatory Approvals BSMI, KC, KCC, e-Standby, RCM, MEPS, CE, FCC, VCCI, PSE AOC G2490VX 24″ FreeSync *. G2490VX has been upgraded to AMD Freesync Premium version since Jan.1.2021 (manufactured date) Screen tearing and stuttering doesn’t only harm gaming performance, it also destroys immersion. AMD FreeSync Premium addresses this by keeping your monitor’s refresh rate synced with your processor’s. Specifications: Specifications : Panel Size 23.8″ Borderless Brightness 350 cd/m² (typical) 3500 : 1 (Typical) 80 Million : 1 (DCR) 1ms (MPRT) Viewing angle 178° (H) / 178° (V) (CR > 10) sRGB 126% (CIE1931) / DCI -P3 87% (CIE 1976) Color accuracy Delta E < 2 Resolution 1920 × 1080 @ 144Hz – DisplayPort, HDMI 16.7 Million HDR MODE 1 Year Warranty manufacturer link
Replacement cable for MacBook Pro A2794, designed to restore proper connection and functionality for damaged or faulty internal cables. Ideal for technicians and repair shops, ensuring reliable performance and correct fit for A2794 models. Type: USB-C to USB-C charging/data cable Model: A2794 Length: 2 meters (≈ 6.6 ft) Color: White Design: Woven braided cable for durability Connectors: USB-C (Male) on both ends Power Delivery: Supports up to 240 W high-power charging when used with a compatible USB-C PD adapter Data Transfer: USB 2.0 transfer speeds Designed for fast charging and syncing between USB-C devices
OEM-quality left and right loudspeaker replacement pair for MacBook Pro 14″ (Model A2442, 2021, M1 Pro/Max)—restores Apple’s high-fidelity six-speaker audio system with precise sound staging, rich bass, and clear highs. Compatible With: MacBook Pro 14-inch (2021, Model A2442) with Apple M1 Pro or M1 Max chip (Model Identifier: MacBookPro18,3 or MacBookPro18,4). Includes: Complete left and right speaker assemblies, each containing: Dual-driver units (force-cancelling woofers + tweeters) Pre-attached flex cables with OEM connectors Mounting brackets and acoustic seals Dual-driver units (force-cancelling woofers + tweeters) Pre-attached flex cables with OEM connectors Mounting brackets and acoustic seals Audio Performance: Matches Apple’s advanced six-speaker sound system with: Wide stereo separation High dynamic range Spatial audio and Dolby Atmos support (when paired with original logic board and firmware) Wide stereo separation High dynamic range Spatial audio and Dolby Atmos support (when paired with original logic board and firmware) OEM Build Quality: Precision-engineered housings with exact acoustic chambers, grille alignment, and cable routing—ensures zero rattling and full macOS audio calibration compatibility. Common Use Cases: Replaces speakers damaged by liquid ingress, physical impact, or internal failure (e.g., no sound, distorted audio, or imbalance between channels). Installation Note: Requires full bottom case and logic board disassembly. Speakers are secured with screws and acoustic adhesive. Highly recommended for certified Apple technicians or experienced professionals only due to complex internal layout and sensitivity of audio components. Important: This speaker pair is exclusive to A2442 (14″, 2021, M1 Pro/Max). Not compatible with 16″ MacBook Pro (A2485), 13″ models, or Intel-based MacBooks. This speaker pair is exclusive to A2442 (14″, 2021, M1 Pro/Max). Not compatible with 16″ MacBook Pro (A2485), 13″ models, or Intel-based MacBooks. Model Verification: Confirm your device via > About This Mac > Model Identifier (must be MacBookPro18,3 or MacBookPro18,4).
Huawei IdeaHub B2 IHB2-65PU 65-inch conferencing display delivers an advanced all-in-one solution for modern meeting rooms. It combines a 4K UHD touchscreen with smart collaboration tools to enhance productivity and communication. As a result, teams can present, write, and share ideas seamlessly across multiple platforms. Moreover, the zero-gap laminated IPS panel ensures sharp visuals and precise touch response. The infrared multi-touch system supports up to 20 touch points, while low latency writing creates a smooth and natural pen experience. In addition, smart handwriting recognition and annotation features improve brainstorming and note-taking efficiency. Furthermore, the device includes dual WiFi connectivity and wide compatibility with Android, Windows, iOS, and macOS systems. The built-in speakers deliver clear audio, and the multiple front and rear ports provide flexible connectivity for various devices. Therefore, it is ideal for presentations, video conferencing, and collaborative workspaces. Huawei IdeaHub B2 65-inch display offers powerful performance, seamless connectivity, and intelligent collaboration features for professional environments. Specifications: 65-inch 4K UHD (3840 × 2160) IPS display with zero-gap laminated glass Infrared multi-touch supporting up to 20 touch points Low latency writing (25 ms) with smart handwriting recognition Dual WiFi (2.4GHz and 5GHz) with multi-OS compatibility Multiple ports including HDMI, USB, Type-C, RJ45, and OPS support
The Samsung 86″ Interactive E-Board LH86WACW offers a large and clear display for classrooms and meeting rooms. It shows bright images with strong detail. The screen size allows everyone in the room to see clearly. This improves communication and teamwork. Moreover, the Samsung Interactive E-Board LH86WACW supports smooth touch control. You can write, draw, and move items with ease. The touch response feels fast and natural. This helps teachers and teams present ideas more effectively. In addition, the board includes multiple connection options. You can connect laptops, tablets, and other devices quickly. This makes sharing content easier for everyone. The board also supports wireless features for more flexible use. Furthermore, the Samsung 86″ Interactive E-Board LH86WACW includes built-in software tools. These tools allow easy note-taking and smart collaboration. You can save your work and share it instantly. This helps improve learning and workflow. Also, the display uses strong protection glass. It resists scratches and damage during daily use. The durable design makes it ideal for schools and offices. It stays reliable even with heavy use. The sleek design of the Samsung Interactive E-Board LH86WACW looks modern and professional. It fits well in classrooms, conference rooms, and training centers. The slim frame gives the screen a clean and elegant look. This makes every space feel more advanced. Overall, the Samsung 86″ Interactive E-Board LH86WACW offers clear visuals, fast touch control, and smart tools in one device. It helps teams share ideas better and faster. It also makes lessons more interactive and engaging. This board is perfect for education, business, and training environments. Specifications: Display : 86″ IPS Resolution : 3840×2160 Refresh Rate : 60Hz Response Time : 8ms Model : LH86WACW
A high-performance pre-owned MacBook Pro 15" (2015) with a stunning Retina display, upgraded 16GB RAM, 128GB SSD, and powerful 2GB dedicated graphics—ideal for developers, creatives, and power users seeking reliable Apple performance.
Alienware 25 Gaming Monitor: AW2521HFLA Diagonal Viewing Size: 62.2 cm 24.5 Inches Preset Display Area (H x V) 543.744 mm x 302.616 mm 21.41″” x 11.91″” 164545.63 mm2 (255.04 inches2) Alienware 25 Gaming Monitor Panel Type: Fast IPS Display Screen Coating Antiglare with 3H hardness Maximum Preset Resolution 1920 x 1080 at 240Hz Viewing Angle (178° vertical / 178° horizontal) Pixel Pitch 0.283 mm x 0.280 mm Pixel Per Inch (PPI) 90 Contrast Ratio 1000: 1 (typical) Aspect Ratio (16:9) Backlight Technology LED edgelight system Brightness 400 cd/m2 (typical) Response Time(typical) True 1ms (gray to gray, in Extreme Mode) Audio Output No Connectivity Connectivity 2 x HDMI (ver 2.0) 1 x DP 1.2 1 x USB 3.0 upstream port (Rear) 2 x USB 3.0 Downstream port (Rear) 2 x USB 3.0 Downstream port [Front Bottom, one with BC1.2 charging capability at 2A(max)] 1 x Headphone-out jack (Front Bottom) 1 x Audio Line-out jack( Rear)AMD Free-Sync™ YesNVIDIA® G-SYNC® Compatible YesAlienFX™ Lighting Yes Dimensions & Weight Height with stand (Compressed ~ Extended) 421.21 mm ~526.08 mm 16.58″ ~ 20.71″ Width 556.29 mm 21.90″Depth 251.92 mm 9.92″Height without stand 328.24 mm 12.92″Width without stand 556.29mm 21.90″ Depth without stand 72.95 mm 2.87″ Weight (panel only – for VESA mount) 3.55 kg 7.81 lb Weight (with packaging) 11.22 kg 24.71 lb Power Voltage Required 100 VAC to 240 VAC / 50 Hz or 60 Hz + 3 Hz /1.5 A (typical)Power Consumption 0.2 W (Off Mode) 0.3 W (Standby Mode) 20.4 W (On Mode) 72 W (Max) Environmental Temperature Range Operating: 0° to 40°C (32° to 104°F) Non-operating: -20° to 60° (-4° to 140° F)Humidity Range Operating: 10% to 80% (non-condensing) Non-Operating:5% to 90% (non-condensing)Altitude Operating: 5,000 m (16,404 ft) max Non-Operating: 12,192 m (40,000 ft) max Chassis Adjustability Height adjustable stand (130 mm) and Height-markers Tilt (-5° to 21°) Swivel (-20° to 20°) Pivot (-90° to 90°) Built in cable-management Low Blue Light Yes, Comfort View Flicker-free Yes Specifications – Service / Support Details 3-Year Advanced Exchange Service and Premium Panel Exchange Color Support Color Gamut (typical): sRGB 99% Color Depth: 16.78 Million colors Built-in Devices NA Flat Panel Mount Interface VESA (100 mm) Specifications: Alienware 25 Gaming Monitor 240Hz refresh rate ips Panel Type: Fast IPS Color Support Color Gamut (typical): sRGB 99% 1 Year Warranty Manufacturer Link
Are you in search of a reliable monitor that combines functionality and style? Look no further than the LG DualUp 28″ Monitor. This comprehensive review will delve into its features, highlighting why it’s an excellent choice for both work and play. Firstly, the dual-screen capabilities of the LG 28″ Monitor provide a seamless multitasking experience. Boost your productivity by effortlessly managing multiple applications side by side, streamlining your workflow. The sleek design of this monitor not only adds a touch of sophistication to your workspace but also ensures practicality. Its slim bezels and adjustable stand contribute to a clutter-free and ergonomic setup, promoting comfort during extended use. With a crisp 4K UHD resolution, this monitor delivers stunning visuals, making it ideal for both work and entertainment. Enjoy sharp images and vibrant colors for a truly immersive experience, whether you’re editing documents or watching your favorite movies. Connectivity is a breeze with the LG 28″ Monitor. Multiple ports, including HDMI and USB-C, offer versatile options for connecting various devices. Say goodbye to cable clutter and hello to a streamlined and organized workspace. The inclusion of reader mode and flicker-safe technology prioritizes your eye health during prolonged use. Reduce eye strain and fatigue, ensuring a comfortable viewing experience for extended periods. In conclusion, the LG DualUp 28″ Monitor is a versatile and stylish addition to any workspace. Its dual-screen capabilities, sleek design, and advanced features make it a top choice for those seeking an enhanced computing experience. Upgrade your setup with the LG DualUp 28″ Monitor today! Specifications: Display : 28″ Nano IPS Resolution : SDQHD (2560 x 2880) Refresh Rate : 60hz Response Time : 5ms GTG
VIEWSONIC MONITOR TD2423 Display Size (in.): 24 Viewable Area (in.): 23.6 Panel Type: VA Technology Resolution: 1920 x 1080 Resolution Type: FHD (Full HD) Static Contrast Ratio: 3,000:1 (typ) Dynamic Contrast Ratio: 20M:1 Light Source: LED VIEWSONIC MONITOR Brightness: 250 cd/m² (typ) Colors: 16.7M Color Space Support: 8 bit (6 bit + Hi-FRC) Aspect Ratio: 16:9 Response Time (Typical GTG): 7ms Response Time (GTG w/OD): 7ms Response Time (Typical Tr+Tf): 25ms Viewing Angles: 178º horizontal, 178º vertical Backlight Life (Hours): 40000 Hrs (Min) Curvature: Flat Refresh Rate (Hz): 75 VIEWSONIC MONITOR Blue Light Filter: Yes Flicker-Free: Yes Color Gamut: NTSC: 72% size (Typ) sRGB: 104% size (Typ) Pixel Size: 0.272 mm (H) x 0.272 mm (V) Touch Screen: IR, 10-point multi-touch Surface Treatment: Glossy, Hard Coating (7H) Cover Glass Thickness: 1.85mm CompatibilityVIEWSONIC MONITOR TD2423 PC Resolution (max): 1920×1080 Mac® Resolution (max): 1920×1080 PC Operating System: Windows 7/8.1/10/11 certified; macOS tested Mac® Resolution (min): 1920×1080 Connector VGA: 1 USB 2.0 Type A: 2 USB 2.0 Type B: 1 3.5mm Audio In: 1 3.5mm Audio Out: 1 HDMI 1.4: 1 DVI-D: 1 Power in: 3-pin Socket (IEC C14 / CEE22) Specifications: VIEWSONIC MONITOR TD2423 Display Size (in.): 24 Viewable Area (in.): 23.6 Panel Type: VA Technology Resolution: 1920 x 1080 Resolution Type: FHD (Full HD) Static Contrast Ratio: 3,000:1 (typ) 1 Year Warranty Manufacturer link
The Samsung Odyssey G4 25″ 240Hz Gaming Monitor is designed to elevate your gaming experience. With its ultra-fast 240Hz refresh rate, you’ll enjoy incredibly smooth and fluid gameplay. Say goodbye to motion blur and lag. Firstly this monitor features a 25-inch display with Full HD resolution, delivering crisp and detailed visuals. Every game you play will look stunning, with vibrant colors and sharp images. Furthermore the Samsung Odyssey G4 is equipped with NVIDIA G-SYNC compatibility, which ensures tear-free and stutter-free gaming. This feature synchronizes the monitor’s refresh rate with your GPU, providing a seamless gaming experience. Moreover designed with gamers in mind, the Odyssey G4 has a sleek and modern design. Its thin bezels offer a more immersive viewing experience, making it perfect for multi-monitor setups. Also adjustability is a key feature of the Samsung Odyssey G4. You can tilt, swivel, pivot, and adjust the height to find the perfect viewing angle. Comfort during long gaming sessions is guaranteed. The monitor also boasts a rapid 1ms response time, reducing ghosting and motion blur. This ensures that every action is rendered smoothly, giving you a competitive edge in fast-paced games. Connectivity is made easy with multiple ports, including HDMI and DisplayPort. You can easily connect your gaming console, PC, or other devices without hassle. In conclusion, the Samsung Odyssey G4 25″ 240Hz Gaming Monitor offers top-tier performance and stunning visuals. Upgrade your gaming setup today and enjoy a superior gaming experience. With its advanced features and ergonomic design, it’s the perfect choice for serious gamers. Specifications: Display : 25″ IPS Resolution : 1,920 x 1,080 Refresh Rate : 240Hz Response Rate : 1ms GTG
Specifications Weight (g) 750 Depth (mm) 500 Width (mm) 140 Height (mm) 190 Input/Output Other Battery Capacity (mAh) 8000 Sound Mode Other Category Speakers Use HOME Input Power (W) <25 W Voice Control No Waterproof No Support APP No Playback Function MP3 Remote Control No Intelligent Personal Assistant None Display Screen Yes Built-in Microphone No Audio Crossover Two-Way Number of Loudspeaker Enclosure 1 Power Source Battery Channels 2 (2.0) Feature Wireless Charger for Mobile Phone Battery Yes Communication Bluetooth Speaker Type Portable Cabinet Material Plastic Brand Name RNABAU Model DB Origin Mainland China Certification CE Type1 Caixa De Som Type2 HiFi Wireless Bluetooth Speaker Type3 Mobile Phone Charger Type4 Alarm Clock Speaker Type5 FM Radio Soundbox Type6 Vintage Bluetooth Speaker Type7 Home Stereo Audio Set
The MSI PRO MP272L E2 27-inch business monitor is designed for productivity, office workflows, and everyday multitasking. It offers a clean and modern design that fits well in professional setups. Therefore, it helps users stay focused while maintaining an organized workspace. Moreover, the IPS panel delivers consistent colors and wide viewing angles for comfortable collaboration. The Full HD resolution ensures clear text and sharp visuals for documents, spreadsheets, and web browsing. In addition, the 100Hz refresh rate provides smoother scrolling and a more responsive experience than standard office displays. The monitor also includes MSI Eye Care technologies such as anti-flicker and low blue light support. As a result, it reduces eye strain during long working sessions. Furthermore, adaptive sync support helps improve smoothness in general media playback. In addition, the MSI PRO MP272L E2 27-inch business monitor supports multiple connectivity options, making it easy to connect laptops, desktops, and other devices. It also includes tilt adjustment for better ergonomic positioning. Consequently, it is suitable for both home offices and corporate environments. The MSI PRO MP272L E2 27-inch business monitor delivers a balanced mix of comfort, clarity, and productivity-focused performance. Specifications: 27-inch Full HD (1920 × 1080) IPS display 100Hz refresh rate for smoother visuals Anti-flicker and low blue light eye-care technology Wide 178° viewing angles for consistent colors HDMI and DisplayPort connectivity with ergonomic tilt support
The Apple MacBook Pro 16-inch (2019) is powered by an Intel Core i7 processor, paired with 16GB RAM and a fast 512GB SSD for powerful and reliable performance. Designed for professionals and creatives, it features a premium aluminum build, immersive 16-inch Retina display, and dedicated Radeon Pro graphics for demanding workloads.
Professional Lavalier Microphone Candc DC-C6 Candc DC-C6 Lavalier Microphone for Smartphones, DSLR, Camcorders, Audio recorders, PC etc. Clip microphone to help you get music or sound.One-directional microphone with anti-noise function. type jack can be connected to PC / laptop / wireless microphone transmitter with 3.5mm line-in / mic in. Built-in clip can be easily attached to collar, tie or other clothes-no installation required. Features: Type: microphone Cable length: about 116 cm Sensitivity: -46 ± 2db : one way Operating voltage: DC1.0V-10 VAcurrent consumption
A dependable pre-owned Lenovo ThinkPad E560 with a spacious 15.6" display, 6th Gen Core i5 processor, 8GB RAM, and a roomy 1TB hard drive—ideal for office work, school, and everyday computing at great value.
This item is available on backorder from abroad. A 50% down payment should be transferred to confirm the order and our salesman will specify the time till arrival after confirmation. The BenQ ZOWIE XL2586X 24″ 540Hz Gaming Monitor is designed for serious gamers. It delivers ultra-smooth visuals, ensuring you never miss a moment in fast-paced games. Firstly with a 540Hz refresh rate, the BenQ ZOWIE provides incredibly smooth gameplay. This high refresh rate reduces motion blur and offers a competitive edge in gaming. Furthermore the monitor features a 24-inch screen, offering a perfect balance between size and performance. It ensures you get an immersive gaming experience without overwhelming your desk space. Moreover the BenQ ZOWIE is equipped with a fast response time. This feature ensures that your actions are reflected on-screen instantly, providing a seamless gaming experience. Also enjoy vibrant and accurate colors with the BenQ ZOWIE XL2586X’s advanced color settings. This monitor allows you to customize your display settings to match your preferences and game requirements. The ergonomic design of the BenQ ZOWIE allows for height, tilt, and swivel adjustments. This ensures you can play comfortably for extended periods, reducing strain and enhancing your focus. The BenQ ZOWIE also includes features like Black eQualizer and Color Vibrance. These features enhance visibility in dark scenes and adjust color settings to your liking. In conclusion, the BenQ ZOWIE XL2586X 24″ 540Hz Gaming Monitor is a top choice for gamers seeking superior performance. Upgrade your gaming setup with the XL2586X and experience the next level of competitive gaming. Specifications: Display : 24.1″ Fast TN Resolution : 1920 x 1080 Refresh Rate : 540Hz
2022 Original New 13" A2681 LCD Screen for MacBook Air M2 EMC 4074 A2681 LCD Screen Replacement 2022 Original New 13″ A2681 LCD Screen for MacBook Air M2 EMC 4074 A2681 LCD Screen Replacement Compatible Model: For MacBook Air 13″ M2 A2681 Screen Display Replacement 2022 Year (Silver) Item Condition: New; Screen Size: 13.6″; Resolution: 2560×1664; Color: Silver.(This is the display replacement accessory is not a laptop) Note: Please be careful to take the screen out of the box. This product should be very careful when installed, we are not responsible for the damage in the process of installation. Please confirm the model and color before buying, do not buy the wrong product. If you have any questions, please get in touch with us.
ZOWIE XL2540K TN 240Hz 24.5 Inch 240Hz Refresh Rate; TN Panel Black eQualizer; Color Vibrance Optional Accessory: S Switch & Shielding Hood
lenovo battery L17M3PG1 L17C3PG1 L17M3PG1 Laptop Battery Compatible with Lenovo Legion Y530-15ICH Y7000 2019 1050 Y7000-2019-PG0 Y540-15IRH-PG0 Y540-17IRH-PG0 Y7000P Series Notebook L17M3PG3 11.34V 52.5Wh About this item 【Battery type】Li-ion. Voltage: 11.34V. Capacity: 52.5Wh 4630mAh . 【Replacement For Laptop】Lenovo Legion Y545-PG0 Legion Y530-15ICH Y7000 2019 1050 Y7000-2019-PG0 Y540-15IRH-PG0 Y540-17IRH-PG0 Y7000P Series. 【Compatible Part Number】L17L3PG1 5B10Q82428 L17C3PG1 5B10Q88561 L17M3PG3 5B10Q93417 L17M3PG1 L17M3PG2 5B10W67238 5B10Q80766 【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.
