✅ Full Specifications: Model: HyperX Cloud II Headphone Type: Over-Ear, Closed-Back Gaming Headset Connection: Wired USB for PC/Mac 3.5mm jack for consoles & mobile Drivers: 53mm Neodymium Surround Sound: Virtual 7.1 Surround Sound (via USB sound card) Frequency Response: Headphones: 15Hz – 25kHz Microphone: 50Hz – 18kHz Impedance: 60 Ohms Sound Pressure Level: 98 ± 3 dB Microphone: Detachable noise-canceling mic TeamSpeak & Discord certified Build: Aluminum frame Memory foam ear cushions Leatherette or velour ear pads Cable Length: 1m headset cable 2m extension with USB control box Compatibility: PC, Mac, PS4, PS5, Xbox (via 3.5mm), Nintendo Switch, Mobile
The Mortal T1 Mini is an ultra-compact, budget-friendly Android TV box designed to turn any standard HDMI television into a smart entertainment platform. It features 4K hardware decoding, dual-band Wi-Fi, and a voice-controlled remote, providing a smooth and responsive experience for local IPTV, YouTube, and mainstream streaming applications. ✅ Full Specifications: Model: Mortal T1 Mini 4K Smart Media Player Interface / Connection: Wi-Fi: Dual-Band (2.4GHz / 5GHz) 802.11n Bluetooth: BT 5.0 (Supports wireless remotes, headphones, and controllers) Wired Network: 1 x 10/100Mbps Ethernet LAN Port (Note: Available on standard mini casing configurations) Input/Output Ports: 1 x HDMI Out, USB Ports, 1 x TF/microSD Card Slot, 1 x DC 5V Power Interface / Connection: Wi-Fi: Dual-Band (2.4GHz / 5GHz) 802.11n Bluetooth: BT 5.0 (Supports wireless remotes, headphones, and controllers) Wired Network: 1 x 10/100Mbps Ethernet LAN Port (Note: Available on standard mini casing configurations) Input/Output Ports: 1 x HDMI Out, USB Ports, 1 x TF/microSD Card Slot, 1 x DC 5V Power Performance / Hardware: CPU: Allwinner H313 Quad-Core ARM Cortex-A53 (up to 1.5GHz) (Also distributed in select regional batches with Rockchip quad-core architectures) GPU: Mali-G31 MP2 / Mali-450MP Graphics Engine Resolution Output: Native HDMI 2.0 supporting up to 4K @ 60Hz Video Decode Formats: 4K Ultra HD hardware acceleration decoding including H.265 HEVC, H.264, VP9, and 3D video support High Dynamic Range (HDR): Supports HDR10+, HDR10, and HLG profiles Performance / Hardware: CPU: Allwinner H313 Quad-Core ARM Cortex-A53 (up to 1.5GHz) (Also distributed in select regional batches with Rockchip quad-core architectures) GPU: Mali-G31 MP2 / Mali-450MP Graphics Engine Resolution Output: Native HDMI 2.0 supporting up to 4K @ 60Hz Video Decode Formats: 4K Ultra HD hardware acceleration decoding including H.265 HEVC, H.264, VP9, and 3D video support High Dynamic Range (HDR): Supports HDR10+, HDR10, and HLG profiles Capacity / Memory Options: 2GB RAM + 16GB eMMC Internal Flash Storage (Storage expandable up to 256GB via TF card slot or external USB drive) Material & Build: Durable, matte plastic compact shell engineered with passive thermal management to maintain low operational temperatures Design & Form Factor: Pocket-sized, ultra-light mini layout designed to easily fit behind wall-mounted or desktop televisions Security & Software: Operating System variants run customized, stable Android TV distributions (Android 13 / Android 14) optimized for app longevity, security patch support, and easy layout control Voice Assistant: Includes an ergonomic voice remote control featuring an integrated microphone button for hands-free Google Assistant commands and quick navigation Compatibility: Fully compatible with major applications like YouTube, Netflix, Disney+, Prime Video, various IPTV clients, and Screen Mirroring Cast protocols Dimensions: Approx. 77 x 77 x 12 mm (May vary slightly up to 88 x 88 x 18 mm depending on exact regional shell style) Weight: Approx. 0.25 to 0.35 kg
Cooler Master GM27-FFS 27″ 0.5ms IPS 165Hz Gaming Cooler Master CMI-GM27-FFS-EK 27″ 0.5ms 165Hz FHD Ultra-Speed IPS Panel FreeSync/G-Sync/A-Sync HDR10 Gaming Monitor (2X HDMI2.0 + 2X Display Port) A no-frills, high-performance monitor which focuses on good specifications and high value. A 27″ FHD monitor equipped with an UltraSpeed IPS 165Hz refresh rate panel, complete with Dynamic Overdrive and Adaptive Sync. Combine that with 120% sRGB/90% DCI-P3 color coverage, and you’ve got a monitor that’ll deliver the performance you need no matter what you are doing. READY FOR ANY SITUATION The 27″ Full HD 165Hz display combined with 90% DCI-P3 wide color gamut makes the GM27-FFS an incredibly versatile monitor. With features essential for both gaming and productivity, you can have the freedom to play your games without a hitch during the night or focus on your work during the day time. ULTRASPEED IPS WITH DYNAMIC OVERDRIVE Equipped with the latest Ultra-Speed IPS panel, GM27-FFS is up to 4x faster than traditional IPS panels. The pixels transition faster to other colors and scenes, leading to an exceptionally smooth picture with significantly less motion blur or smearing. Specifications: Cooler Master GM27-FFS 27″ 0.5ms IPS 165Hz Gaming 1 years warranty
Genuine-spec touchpad flex cable for MacBook Pro 15″ (Model A1707, 2016–2017)—restores full Force Touch functionality, haptic feedback, and precise multi-touch gesture control during trackpad repair or replacement. Compatible With: MacBook Pro 15″ (2016) – Model A1707 (Model Identifier: MacBookPro13,2) MacBook Pro 15″ (2017) – Model A1707 (Model Identifier: MacBookPro14,2) MacBook Pro 15″ (2016) – Model A1707 (Model Identifier: MacBookPro13,2) MacBook Pro 15″ (2017) – Model A1707 (Model Identifier: MacBookPro14,2) Part Type: Touchpad flex cable only — does not include the trackpad housing, Taptic Engine, or mounting hardware. This is the OEM-style ribbon cable that connects the trackpad to the logic board. Function: Transmits: Touch input coordinates Force Touch pressure data Haptic feedback signals to the Taptic Engine Enables full macOS gesture support: Force Click, three-finger lookup, swipe navigation, pinch-to-zoom, and smooth cursor tracking. Touch input coordinates Force Touch pressure data Haptic feedback signals to the Taptic Engine Enables full macOS gesture support: Force Click, three-finger lookup, swipe navigation, pinch-to-zoom, and smooth cursor tracking. OEM-Quality Build: Matches Apple’s original specifications in: Cable length and routing path Connector pitch and ZIF latch design EMI shielding and flex durability Cable length and routing path Connector pitch and ZIF latch design EMI shielding and flex durability Common Use Cases: Replacing a torn, creased, or liquid-damaged original flex cable Completing a trackpad replacement when the original cable is compromised Fixing intermittent trackpad behavior, loss of Force Touch, or complete unresponsiveness Replacing a torn, creased, or liquid-damaged original flex cable Completing a trackpad replacement when the original cable is compromised Fixing intermittent trackpad behavior, loss of Force Touch, or complete unresponsiveness Installation Note: Requires full bottom case removal and battery disconnection. Cable routes under internal components near the right speaker and logic board. Connects via a ZIF (Zero Insertion Force) socket—must be aligned carefully and latched gently. Recommended for experienced or certified technicians only. Requires full bottom case removal and battery disconnection. Cable routes under internal components near the right speaker and logic board. Connects via a ZIF (Zero Insertion Force) socket—must be aligned carefully and latched gently. Recommended for experienced or certified technicians only.
Replacement Keyboard for MacBook Pro 13" inch A1706 & MacBook Pro 15" inch A1707 Touch Bar (for Late 2016 mid 2017 Year) Replacement Keyboard for MacBook Pro 13″ inch A1706 & MacBook Pro 15″ inch A1707 Touch Bar (for Late 2016 mid 2017 Year) 【Compatibility】This replacement keyboard is Compatible with original MacBook Pro 13″ inch A1706 & MacBook Pro 15″ inch A1707 Touch Bar (for Late 2016 mid 2017 Year) Laptop. 【Compatible Part Numbers】661-06377 【Compatible MBP Numbers】A1706 series :MacBook Pro 13 inch 2017 MacBookPro14,2 & MacBook Pro 13 2016 MacBookPro13,2 MNQF2LL/A MNQG2LL/A MLH12LL/A MLVP2LL/A etc A1707 series:MacBook Pro 15 inch 2016 MacBookPro13,3 & MacBook Pro 15 inch 2017 MacBookPro14,3 Release June 2017 MPTR2LL/A MPTU2LL/A MPTT2LL/A MPTV2LL/A Release October 2016 MLH32LL/A MLW72LL/A MLH42LL/A MLW82LL/A
The ViewSonic VX2480-2K-SHD 24″ 75Hz Monitor elevates your visual experience with its stunning 24-inch display. Whether you’re working, gaming, or watching movies, this monitor delivers crisp and clear images. With a 2K resolution, the ViewSonic VX2480-2K-SHD ensures every detail is visible and vibrant. Enjoy sharp, lifelike visuals that make your content come alive, from photos to videos and everything in between. The 75Hz refresh rate provides smooth and fluid motion, making it perfect for gaming and fast-paced videos. Say goodbye to screen tearing and lag, and enjoy a seamless viewing experience with the ViewSonic VX2480-2K-SHD. Designed for versatility, this monitor offers multiple connectivity options, including HDMI and DisplayPort. Easily connect your devices and switch between them without hassle, making your workspace more efficient. The ViewSonic VX2480-2K-SHD 24″ Monitor features an ultra-slim bezel design, maximizing your screen space and creating a sleek, modern look. Its ergonomic stand allows you to adjust the height and tilt for the most comfortable viewing position. Eye-care technology in the ViewSonic VX2480-2K-SHD reduces eye strain during extended use. With features like Flicker-Free and Blue Light Filter, you can work or play for longer without discomfort. In conclusion, the ViewSonic VX2480-2K-SHD 24″ 75Hz Monitor offers a perfect blend of stunning visuals, smooth performance, and ergonomic design. Upgrade to the ViewSonic VX2480-2K-SHD today and transform your viewing experience. Specifications: Display : 24″ IPS Resolution : QHD 2560 x 1440 Refresh Rate : 75Hz Response Rate : 3.89ms
The Lenovo L29w-30 is a 29-inch QHD business monitor designed for productivity and multitasking. First, its 2560 × 1080 resolution delivers sharp and clear visuals for spreadsheets, documents, and presentations. The ultra-wide 21:9 aspect ratio allows seamless multitasking across multiple windows. In addition, the monitor features a slim bezel design for a clean, professional workspace. Moreover, anti-glare technology reduces eye strain during extended use. The adjustable stand provides tilt and height options for comfortable viewing. Furthermore, multiple connectivity options, including HDMI and DisplayPort, ensure easy integration with laptops and desktops. Finally, the Lenovo L29w-30 combines wide-screen clarity, ergonomic adjustments, and flexible connectivity in one business monitor. Overall, it is ideal for office environments, remote work, and professional setups. Specifications: 29″ 2560 × 1080 QHD resolution Ultra-wide 21:9 aspect ratio Adjustable tilt and height stand Anti-glare display for reduced eye strain HDMI and DisplayPort connectivity
The Samsung 85-Inch QLED 4K Smart TV QA85Q7FAAUXTW delivers a premium large-screen viewing experience with advanced QLED display technology. It produces bright, sharp, and colorful images, so movies, sports, and games look immersive and detailed on the massive 85-inch screen. QLED technology uses Quantum Dot enhancement to improve brightness and color accuracy. As a result, visuals appear more vivid and balanced across both dark and bright scenes. This helps maintain consistent picture quality in different lighting conditions and content types. Samsung Vision AI enhances picture and sound in real time. It analyzes each scene and automatically adjusts brightness, sharpness, and color for optimal results. Therefore, the TV consistently delivers improved visuals without manual tuning. In addition, AI upscaling improves lower-resolution content closer to 4K quality for better clarity and detail. HDR support expands contrast and color depth, making visuals more dynamic and lifelike. Fast motion handling also improves clarity, which enhances sports and action content by reducing blur and improving smoothness. The Smart TV platform provides easy access to streaming apps, gaming features, and smart home controls. It runs smoothly and allows quick switching between applications. In addition, the slim design with thin bezels gives the Samsung 85 QLED 4K Smart TV QA85Q7FAAUXTW a modern and premium appearance suitable for large living spaces. Overall, this Samsung QLED TV combines strong brightness performance, AI optimization, and smart connectivity for an immersive home entertainment experience. Specifications: QLED technology delivers bright and vivid picture quality 85-inch 4K display provides immersive large-screen viewing Vision AI optimizes picture and sound automatically in real time HDR improves contrast, brightness, and color depth Smart TV platform supports apps, streaming, and smart features
The Samsung S3 S30GD 22″ 100Hz Monitor offers clear Full HD visuals on a compact 22-inch IPS display. Additionally, the panel delivers consistent colors and wide viewing angles, which makes it suitable for both work and entertainment. The 100Hz refresh rate also ensures smoother motion compared to standard displays. Moreover, Game Mode enhances contrast and visibility during videos and casual gaming. Therefore, scenes appear clearer and more detailed in darker areas. The monitor also includes Eye Saver Mode and flicker free technology, which help reduce eye strain during long sessions. Furthermore, the design is simple and practical for everyday setups. In addition, connectivity includes HDMI and VGA ports for easy connection to different devices. Overall, the Samsung S3 S30GD 22″ 100Hz Monitor is a reliable choice for daily use. Specifications: 22‑inch Full HD (1920 x 1080) IPS panel displays vivid colors and wide viewing angles. Smooth motion with up to 100Hz refresh rate for better video and game performance. Game Mode optimizes contrast and image settings for interactive content. Eye Saver Mode and flicker‑free technology help reduce eye strain during long sessions. Simple connectivity with one HDMI port and one D‑Sub (VGA) port.
The SAMSUNG 27A804UJN Monitor delivers sharp visuals with 4K UHD resolution and IPS technology. First, it provides accurate colors and wide viewing angles for work and entertainment. The monitor features a 27-inch display, 60Hz refresh rate, and 300 nits brightness. In addition, it includes HDMI and DisplayPort for easy connection to multiple devices. Moreover, the adjustable stand supports height and tilt for better comfort. Therefore, users can enjoy clear images, smooth performance, and a flexible setup for daily use. Specifications: 27″ UHD 3840 x 2160 resolution delivers sharp and detailed images IPS panel provides accurate colors and wide viewing angles 60Hz refresh rate ensures smooth performance for daily tasks HDMI and DisplayPort enable easy connection to multiple devices Height and tilt adjustment improves comfort and viewing position
Laptop Accessories US Version Keyboard for MacBook Retina 13 M1 A2338 2020 EMC 3578 Original Computer Replacement Keyboards Laptop Accessories US Version Keyboard for Macbook Retina 13 M1 A2338 2020 EMC 3578
View Sonic Monitor ViewSonic LCD Display XG2405 XG2405 24″ 24-inch 3-side Borderless Display 144Hz Refresh Rate 1ms (GtG) Response Time AMD FreeSync Specifications: View Sonic Monitor ViewSonic LCD Display XG2405 XG2405 24″ 24-inch 3-side Borderless Display 144Hz Refresh Rate 1ms (GtG) Response Time AMD FreeSync 1 Year Warranty
Looking for a reliable monitor that combines performance and affordability? The BenQ GW2780 monitor might be your perfect choice, offering an array of features to enhance your visual experience. To begin with, the GW2780 boasts a sleek design that seamlessly blends with any workspace. Its slim bezels create a borderless display, providing an immersive viewing experience for work or entertainment. Equipped with a 27-inch Full HD display, the monitor delivers crisp and clear visuals. Whether you’re working on spreadsheets, watching videos, or gaming, the GW2780 ensures sharp images and vibrant colors. The In-Plane Switching (IPS) technology ensures wide viewing angles, allowing you to enjoy consistent colors and brightness from any angle. Say goodbye to distorted colors and limited viewing positions. Eye strain is a thing of the past with the BenQ GW2780. The Low Blue Light technology reduces harmful blue light emissions, and the flicker-free feature eliminates screen flickering, providing a comfortable viewing experience for extended periods. Connectivity is a breeze with the multiple ports, including HDMI and VGA. Easily link your monitor to various devices such as laptops, desktops, and gaming consoles. The user-friendly design ensures a hassle-free setup. The BenQ GW2780 monitor not only prioritizes performance but also energy efficiency. Energy Star certification reflects its commitment to reducing environmental impact, making it an eco-friendly choice. In summary, the BenQ GW2780 monitor offers a winning combination of affordability and top-notch features. Elevate your viewing experience with this reliable display solution that caters to your entertainment and productivity needs effortlessly. Specifications: Display : 27″ IPS Resolution : 1920×1080 IPS Response Time : 5ms Refresh Rate : 60hz
Short Description HP LaserJet MFP M141w — compact wireless monochrome printer for home and office use.• Print | Scan | Copy • Wireless & USB Connectivity • Fast Printing SpeedCompact Design | Energy Efficient
Smooth, precise, and completely wireless. The Apple Magic Trackpad brings the best laptop navigation to your desktop. Available in both White and Black, it features a large glass surface, Force Touch technology for deeper control, and a modern USB-C port for easy charging. It connects instantly to your Mac or iPad and keeps running for a month or more on a single charge. Make navigating your computer effortless with the Apple Magic Trackpad (A3120). Designed with a wide, smooth glass surface, it lets you swipe, scroll, and zoom using the same natural hand gestures you use on a laptop. It is the perfect tool to keep your desk clean and your workflow productive. Key Features: Force Touch: Built-in sensors know how hard you press, letting you click deeper to open previews, look up definitions, and reveal hidden menus. Large Glass Surface: The spacious edge-to-edge design gives you plenty of room to scroll through large documents or edit photos comfortably. Updated with USB-C: Now features a universal USB-C port for charging and pairing, matching all your modern cables. Long Battery Life: The built-in rechargeable battery lasts about a month or more before needing a quick recharge. Easy Setup: Pairs automatically with your Mac via Bluetooth right out of the box, with no complicated configuration needed. Sleek Colors: Choose between classic White or premium Black to perfectly match your desktop setup. Specifications at a Glance: Model: A3120 Colors: White / Black Connection: Wireless / Bluetooth / USB-C Surface: Premium Edge-to-Edge Glass Compatibility: Mac and iPad
HUAWEI IdeaHub B2 IHB2-86PU 86-inch conferencing display delivers clear 4K visuals for meetings and collaboration. It allows teams to share ideas effectively and work interactively. As a result, conferences become more productive and engaging. The display features zero-gap laminated glass and D-LED/IPS technology. Therefore, it offers sharp images and reduced glare. The 60Hz panel ensures smooth visuals during presentations. It supports up to 20 touch points with infrared multi-touch. In addition, smart handwriting recognition and annotation enable natural note-taking. Low latency writing ensures precise input with the magnetic stylus pens. The system includes a quad-core CPU, 4GB RAM, and 32GB storage. Consequently, it runs applications smoothly. It supports Android, Windows, iOS, and macOS for versatile use. It also includes key capabilities such as 4K UHD resolution, multi-touch interaction, smart annotation, dual Wi-Fi connectivity, and enhanced audio. HUAWEI IdeaHub B2 IHB2-86PU is designed to improve collaboration in professional environments. Specifications: 86-inch 4K UHD display with 3840 × 2160 resolution Supports up to 20 touch points with infrared multi-touch Zero-gap laminated glass with D-LED/IPS panel Low latency writing with smart annotation and magnetic pens Quad-core CPU with 4GB RAM, 32GB storage, and dual Wi-Fi
Lightning-fast: Experience the best available in IPS Technology with native refresh rates of up to 240Hz. 1ms response. No gimmicks: A true 1ms response time blasts away ghosting and blurs for clear images with no artificial tricks needed. The ultimate color coverage True colors, real speed: New, fast IPS technology helps maintain image clarity from every angle of the screen. Plus, with up to 99% sRGB color coverage, you have a wide array of colors in your arsenal. Best of both worlds: A 24.5” monitor combined with native FHD 1080p resolution provides the best pixel-per-inch ratio, so details are clearer and images are life-like, making the 24.5” form factor the ideal size for high speed gaming.
The ViewSonic VA2450-H-12 24″ FHD 100Hz Monitor offers smooth visuals for work, entertainment, and gaming. It delivers sharp Full HD clarity with bright colors. The screen shows clean images that make videos and documents look better. This helps you enjoy a more comfortable viewing experience. Moreover, the ViewSonic VA2450-H-12 24″ FHD 100Hz Monitor features a fast 100Hz refresh rate. This reduces motion blur during fast scenes. It makes gaming smoother and more responsive. It also improves scrolling and general use. In addition, the monitor includes HDMI and VGA ports. These connections make setup quick and simple. You can use the monitor with laptops, PCs, and media devices. This offers strong flexibility for daily tasks. Furthermore, the ViewSonic VA2450-H-12 24″ FHD 100Hz Monitor has an eye-care design. It includes flicker-free technology to reduce strain. The blue light filter helps protect your eyes during long sessions. This makes the monitor ideal for work and study. Also, the slim frame design gives the monitor a modern look. It saves space on your desk and improves your workspace. The clean edges make multi-monitor setups easy and seamless. This helps create a professional environment. The stand on the ViewSonic VA2450-H-12 24″ FHD 100Hz Monitor offers stable support. You can tilt the screen for better viewing comfort. This helps you find a position that suits your posture. It improves your daily productivity. Overall, the ViewSonic VA2450-H-12 24″ FHD 100Hz Monitor provides clear visuals, smooth motion, and strong comfort. It works well for gaming, work, streaming, and general use. It is a reliable choice for users who want performance and simplicity. Specifications: Display : 24″ IPS Resolution : 1920×1080 Refresh Rate : 100Hz Response Time : 5ms
AOC 27G4XE 27-inch 180Hz gaming monitor delivers fast and smooth performance for competitive gaming. It focuses on high refresh rate visuals, low response time, and responsive gameplay for esports and daily use. Additionally, it features a 27-inch Fast IPS panel with Full HD resolution (1920 × 1080). This panel provides sharp image quality and wide viewing angles, so it improves clarity in games and general use. Moreover, it supports a 180Hz refresh rate with up to 0.5ms MPRT response time. As a result, it delivers very smooth motion and reduces blur during fast action scenes. The monitor also includes 1ms GTG response performance. Therefore, it improves pixel transition speed and helps reduce ghosting in competitive gameplay. In addition, it supports Adaptive Sync technology. This reduces screen tearing and stuttering, so gameplay stays stable and fluid. Furthermore, it includes HDR10 support and low input lag mode. These features improve contrast and responsiveness for a better gaming experience. AOC 27G4XE 27-inch 180Hz gaming monitor provides fast performance, smooth motion clarity, and essential esports-focused features for competitive players. Check out other option here! Specifications: 27-inch Fast IPS panel with Full HD 1920 × 1080 resolution 180Hz refresh rate for ultra-smooth gameplay 0.5ms MPRT response time for reduced motion blur 1ms GTG response for fast pixel transitions Adaptive Sync and HDR10 support for stable visuals
The Samsung Odyssey G9 LS49DG952SMXUE features a 49-inch OLED panel with Dual QHD resolution (5120 × 1440) and a 32:9 aspect ratio. The ultrawide format provides the screen space of two 27-inch QHD monitors in a single display, making it suitable for gaming, multitasking, and content creation. The monitor supports a refresh rate of up to 240Hz and a response time of 0.03ms GTG. As a result, fast-moving content appears smoother and more responsive during competitive gaming. In addition, AMD FreeSync Premium Pro support helps reduce screen tearing and stuttering. Samsung uses OLED panel technology to provide per-pixel lighting control. Therefore, the display delivers deep blacks, high contrast, and accurate color reproduction without a traditional backlight. The monitor includes Samsung Smart TV functionality powered by Tizen OS. Users can access streaming applications and smart features directly from the monitor without connecting a PC. Connectivity includes HDMI, DisplayPort, USB ports, Wi-Fi, Bluetooth, and Ethernet support. In addition, the monitor supports Picture-by-Picture and Picture-in-Picture modes for multitasking across multiple input sources. This model focuses on high-refresh-rate gaming, OLED image quality, and integrated smart features within a 49-inch curved ultrawide display. Specifications: 49-inch OLED panel with 5120 × 1440 Dual QHD resolution 240Hz refresh rate and 0.03ms GTG response time 32:9 ultrawide aspect ratio AMD FreeSync Premium Pro support Tizen OS with HDMI, DisplayPort, USB, Wi-Fi, and Bluetooth connectivity
