Looking to enhance your visual experience? The AOC 22B3HM 21″ 75Hz Monitor is here to elevate your viewing pleasure. With its sleek design and impressive features, it’s the perfect addition to any setup. First and foremost, let’s talk about clarity. The AOC 22B3HM boasts a vibrant 21-inch display that delivers crisp and clear visuals. Whether you’re watching movies, browsing the web, or gaming, every detail will pop with vividness. Transitioning to performance, this monitor offers a smooth and seamless viewing experience with its 75Hz refresh rate. Say goodbye to motion blur and hello to fluid motion, whether you’re scrolling through content or gaming. Moreover, its slim bezel design provides an immersive viewing experience, allowing you to focus entirely on the content at hand. Get ready to dive into your favorite movies and games like never before. In addition, the monitor’s adjustable stand offers ergonomic comfort, allowing you to find the perfect viewing angle for extended use. Say goodbye to neck strain and hello to comfortable viewing for hours on end. Furthermore, with multiple connectivity options, including HDMI and VGA ports, the AOC 22B3HM ensures compatibility with a wide range of devices. Connect your gaming console, PC, or laptop effortlessly and enjoy your content in style. In conclusion, the AOC 22B3HM 21″ 75Hz Monitor is a game-changer in the world of displays. With its stunning visuals, smooth performance, and ergonomic design, it’s the perfect choice for anyone looking to enhance their viewing experience. Upgrade your setup today and immerse yourself in the world of vibrant visuals. Check out other option here! Specifications: Display : 21.5″ VA Resolution : 1920 x 1080 (FHD) Refresh Rate : 75Hz Response Rate : 4ms
The Dell UltraSharp 34 Curved Thunderbolt Hub Monitor transforms your workspace with stunning visuals and seamless connectivity. Ideal for professionals and creatives, this monitor elevates your productivity and entertainment experiences. With its 34-inch curved screen, the Dell UltraSharp Monitor provides an immersive viewing experience. The WQHD resolution ensures sharp and vibrant visuals, making it perfect for detailed work and multimedia consumption. Connectivity is a breeze with the Dell UltraSharp 34 Curved Thunderbolt Hub Monitor. Featuring Thunderbolt 3, USB-C, HDMI, and DisplayPort options, it supports a wide range of devices for a clutter-free workspace. The integrated Thunderbolt hub enhances your workflow by providing power delivery, data transfer, and video output all through a single cable. This simplifies your setup and reduces cable clutter. Designed with comfort in mind, the Dell UltraSharp Monitor offers adjustable height, tilt, and swivel options. You can easily customize your viewing position for maximum comfort during long hours of use. The monitor’s advanced IPS technology ensures consistent color accuracy and wide viewing angles. This makes it ideal for tasks requiring precise color reproduction, such as graphic design and photo editing. Enjoy peace of mind with Dell’s ComfortView feature, which reduces harmful blue light emissions. This helps minimize eye strain, allowing you to work comfortably for extended periods. In conclusion, the Dell UltraSharp 34 Curved Thunderbolt Hub Monitor combines stunning visuals, versatile connectivity, and ergonomic design. Enhance your workspace with this exceptional monitor and boost your productivity and creativity. Specifications: Display : 34″ IPS Resolution : 3440 x 1440 Refresh Rate : 120Hz Response Rate : 5ms
Specifications : Display Diagonal Viewing Size 86.27 cm 34.14 inches Preset Display Area (H x V) 799.80 mm x 344.80 mm 31.49″ x 13.18″ 267773.04 sq-mm (415.01 sq-inches) Panel Type In-Plane switching Technology Display Screen Coating Antiglare with hard-coating 3H Maximum Preset Resolution 3440 x 1440 at 60Hz Viewing Angles 178° vertical / 178° horizontal Pixel Pitch 0.233 mm x 0.233 mm Pixel Per Inch (PPI) 109 Contrast Ratio 1,000 to 1 (typical) Aspect Ratio 21:9 Backlight Technology LED edgelight system Brightness 300 cd/m² (typical) Response time 8 ms for NORMAL mode 5 ms for FAST mode Adjustability Height adjustable (115 mm), Tilt (-5° to 21°) Swivel (-30° to 30°) Pivot (N/A) PbP / PiP PbP (Yes) PiP (Yes) Daisy Chain Availability No Dell Display Manager Compatibility Yes, Easy Arrange and other key features Remote Asset Management Yes, via Dell Command Monitor Specifications – Service / Support Details 3-Year Advanced Exchange Service and Limited Hardware Warranty Color Support Color Gamut (typical): 99.9% sRGB, CIE1976 (90%), CIE1931 (75%) Color Depth: 1.074 Billion colors Color Calibration Accurancy Delta E < 3 (average) Color Calibration with X-rite colorimeter No Built-in Devices USB 3.0 super-speed hub (with 2 x USB 3.0 upstream port) 4 x USB 3.0 downstream ports Security Security lock slot (cable lock sold separately) Anti-theft stand lock slot (to panel) Compliant Standards BFR/PVC-free (Halogen-free) excluding external cables Meets NFPA 99 leakage current requirements Arsenic-Free glass and Mercury-Free for the panel only Product Safety, EMC and Environmental Datasheets Dell Regulatory Compliance Home Page Dell and the Environment Flat Panel Mount Interface VESA (100 mm) Audio Output 1 x Audio line-out Connectivity 2 x HDMI 2.0 (HDCP 2.2) 1 x DP 1.2 (HDCP 2.2) 2 x USB 3.0 Upstream port 2 x USB 3.0 Downstream port (side) 2 x USB 3.0 Downstream port (bottom) 1 x USB Type-C (DisplayPort DP1.2 Alternate Mode, Power Delivery up to 90W (Typical), and USB 2.0) Dimensions & Weight Height with stand (Compressed ~ Extended) 417.0 mm ~ 532.0 mm 16.42″ ~ 20.94″ Width 813.6 mm 32.03″ Depth 226.4 mm 8.91″ Height without stand 363.7 mm 14.32″ Width without stand 813.6 mm 32.03″ Depth without stand 58.4 mm 2.30″ Weight (panel only – for VESA mount) 8.2 kg 18.07 lb Weight (with packaging) 16.0 kg 35.27 lb Power Voltage Required 100 VAC to 240 VAC / 50 Hz or 60 Hz + 3 Hz / 3 A (typical) Power Consumption (Operational) 54 W (typical) 250 W (maximum)** Power Consumption Stand by / Sleep Less than 0.5W **Maximum power consumption with max luminance, and USB active. Environmental Operating Conditions Temperature Range Operating: 0°C to 40°C (32°F to 104°F) Non-operating: –20°C to 60°C (–4°F 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 In The Box Monitor, Stand Riser, Stand Base 1 x Power cable 1 X DP Cable (DP to DP) 1 X USB Type-C Cable (C to C) 1 x HDMI Cable 1 x USB 3.0 upstream cable Quick setup guide Safety, Environmental, and Regulatory Information Factory Calibration Report 1 Year Warranty manufacturer link
WIWU Macbook Mate for Macbook Accessories Storage Bag *Two layers with Slim design with big capacity for cards, Coins, cash, passport, tickets, accessroies, mobile phone, etc. *Frond pocket slots are wide enough to accommodate large cell phones like iphone 7 plus making this one of the most important identity protector essentials for men and women *RFID blocking material helps prevent identity theft by blocking RFID signals of 13.56 MHz frequency, used by RFID chips in credit cards and passport
Are you searching for the ultimate gaming monitor to fuel your passion? Look no further than the Samsung Odyssey G65B Gaming Monitor. Crafted with precision and innovation, this monitor sets the standard for gaming excellence. The Samsung Odyssey G65B boasts a stunning curved display that pulls you into the heart of the action. Immerse yourself in every detail with its expansive 65-inch screen, providing a truly immersive gaming experience. With a lightning-fast refresh rate and response time, the Odyssey G65B ensures smooth gameplay without motion blur or input lag. Dominate the competition with precise, fluid movements that give you the edge in every game. Equipped with Quantum Dot technology, this monitor delivers lifelike colors and breathtaking clarity. Experience vibrant visuals that bring your favorite games to life with stunning realism and depth. Say goodbye to screen tearing and stuttering thanks to the Odyssey G65B’s support for NVIDIA G-SYNC and AMD FreeSync technologies. Enjoy tear-free gaming sessions with buttery-smooth gameplay, no matter your graphics card. The Odyssey G65B isn’t just a gaming monitor—it’s a command center for your gaming experience. With features like Picture-by-Picture and Picture-in-Picture, you can multitask like never before, keeping an eye on multiple sources simultaneously. In conclusion, the Samsung Odyssey G65B Gaming Monitor raises the bar for gaming displays. Dive into a world of unparalleled performance, stunning visuals, and immersive gameplay. Upgrade your gaming setup with the Odyssey G65B and experience gaming like never before. Specifications: Display : 32″ Curvature : 1000R Resolution : 2,560 x 1,440 QHD Refresh Rate : 240Hz Response Rate : 1ms(GTG)
Acer KA240Ybi 24´´ FHD LED 75Hz Monitor – Display diagonal: 60.5 cm (23.8) – Display resolution: 1920 x 1080 pixels – HD type: Full HD – Display technology: LCD – Response time: 4 ms – Native aspect ratio: 16:9 – Viewing angle horizontal: 178° Viewing angle – vertical: 178°. Built-in speaker(s). – Built-in USB hub. – VESA mounting Height adjustment Specifications: Acer KA240Ybi 24´´ FHD LED 75Hz Monitor Display diagonal: 60.5 cm (23.8) – Display resolution: 1920 x 1080 pixels – HD type: Full HD – Display technology: LCD – Response time: 4 ms
A1707 Battery Replacement, A1820 Battery for MacBook Pro 15″ (Late 2016, Mid 2017) Touch Bar EMC 3072 EMC 3162 MLH32 MLH42 MLW72 MLW82 MPTR2 MPTT2 MLH52 MLW92 MPTU2 MPTV2 MPTW2 MPTX2 Specification】Voltage: 11.4V. Capacity: 76Wh 6667mAh. Battery Type: Li-ion. Condition: Brand new, from high quality materials, top circuit boards and smart chip. 【Compatible Part Number】A1820, A1707, A1707(EMC 3072), A1707(EMC 3162), 020-01728, MacBookPro13,3 , MacBookPro14,3. 【Compatible Laptop Models】MacBook Pro 15-Inch (Late 2016) & (Mid 2017) Model A1707 with touch bar, fit for MLH32LL/A MLH42LL/A MLH52LL/A MLW92LL/A MPTU2LL/A MPTV2LL/A MPTR2LL/A MPTT2LL/A MPTW2LL/A MPTX2LL/A MLW72LL/A MLW82LL/A. 【Note】The tools are included. Double-sided tape is attached to the back of the battery or double-sided tape is included in the package. But No battery installation instruction. The MBP battery is difficult to disassemble, we suggest you search for related installation videos on the Internet or find a technician for help.
The Moxom MX-ST05 Safety Power Strip combines 4 AC outlets with 8 USB charging ports (6×USB-A + 2×USB-C). It supports up to 2500W / 10A total load and delivers 17W USB fast charging, making it a compact all-in-one power and charging hub for home or office use. ⚡ 12-in-1 Power Hub: 4 AC sockets plus 8 USB ports let you power and charge many devices at once. 🔌 High Power Capacity: Handles up to 10A / 2500W total output for laptops, monitors, chargers, and appliances. 🔋 USB Fast Charging: 6×USB-A + 2×USB-C deliver up to 5V/3.4A (17W max total) for phones, tablets, earbuds, and accessories. 🛡️ Safety Protection: Built-in protection against over-voltage, over-current, overheating, and foreign-object detection. ⏻ Main Power Switch: One-touch on/off button to cut power safely to all connected devices. 🧊 Durable Build: Made from ABS + PC materials for heat resistance and long-term durability. 📏 Long Cable: Comes with about 1.8–2.0m cord for flexible placement.
The MSI G244F 24″ 180Hz Gaming Monitor is designed for smooth, fast-paced gaming. With a 180Hz refresh rate, it delivers ultra-smooth visuals for an immersive experience. Say goodbye to screen tearing and lag during intense gameplay. This 24-inch gaming monitor features an IPS panel for vibrant colors and wide viewing angles. Whether you’re gaming or streaming, the visuals are sharp and detailed. The Full HD resolution ensures crisp images, making every detail stand out. The MSI G244F supports a 1ms response time for quick reactions. This reduces motion blur, giving you a competitive edge in fast-action games. It’s perfect for FPS, racing, and esports titles where speed matters. Setting up the monitor is simple with its versatile connectivity options. It includes HDMI and DisplayPort inputs, making it compatible with PCs, consoles, and laptops. The adjustable stand allows you to tilt the screen for the best viewing angle. Additionally, the MSI G244F 24″ 180Hz Gaming Monitor features anti-flicker and blue light reduction technologies. These reduce eye strain, so you can play longer without discomfort. It’s designed to keep you comfortable during long gaming sessions. With its sleek, modern design, this monitor looks great in any gaming setup. The slim bezels offer a more immersive viewing experience, especially in multi-monitor setups. Upgrade your gaming experience with the MSI G244F 24″ 180Hz Gaming Monitor and enjoy fluid, responsive gameplay. Specifications: Display : 23.8” Rapid IPS Resolution : 1920 x 1080 (FHD) Refresh Rate : 180Hz Response Rate : 1ms
BenQ PD3205U 32” 4K UHD IPS Monitor | 3840×2160 | 3 Years Warranty is a professional 32-inch display designed for productivity, creative work, and Mac/PC users who need accurate colors and a large workspace. It uses a 31.5-inch IPS panel with 4K UHD resolution (3840×2160). Therefore, it delivers sharp text, clear images, and high pixel density for multitasking and design work. In addition, it supports 99% sRGB and 99% Rec.709 color coverage for consistent and accurate color output. Moreover, it includes HDR10 support with up to 350 nits peak brightness. As a result, it improves contrast in supported HDR content while maintaining stable SDR performance. In addition, the monitor uses a 1000:1 contrast ratio for balanced image depth. The PD3205U features a 60Hz refresh rate and 5ms response time. Therefore, it focuses on productivity rather than competitive gaming. In addition, the IPS panel provides wide 178° viewing angles for consistent visuals from different positions. Connectivity includes USB-C with up to 90W power delivery. As a result, it can charge a laptop while sending video, data, and audio through a single cable. In addition, it supports HDMI 2.0, DisplayPort 1.4, USB-A, USB-B, and a built-in KVM switch for multi-device control. Furthermore, it includes Eye-Care technologies such as Flicker-Free and Low Blue Light modes. Therefore, it helps reduce eye strain during long work sessions. In addition, the ergonomic stand supports height, tilt, swivel, and pivot adjustments for better comfort. Finally, the BenQ PD3205U delivers a large 4K workspace, accurate color performance, and full USB-C docking functionality for professional and Mac-based workflows. Specifications: Display: 32-inch IPS panel with 3840×2160 4K UHD resolution Color: 99% sRGB and 99% Rec.709 coverage Brightness: 250 nits typical, up to 350 nits HDR peak Connectivity: USB-C 90W, HDMI 2.0, DP 1.4, USB hub, KVM switch Ergonomics: Height, tilt, swivel, pivot adjustable stand with Eye-Care features
Non-slip, skid-proof rubber feet designed to perfectly fit MacBook Air models A1466, A1369, and A1370—restoring grip, stability, and protection for your laptop’s base. Keep your MacBook Air steady and scratch-free with these high-quality replacement rubber feet, engineered to match the original Apple design for MacBook Air models A1466 (2010–2017), A1369 (11″ 2010–2011), and A1370 (11″ 2011–2015). These skid-proof rubber feet provide excellent traction on desks, tables, and other smooth surfaces, preventing unwanted sliding during typing or use. Made from durable, soft-touch silicone-rubber material, they also help protect your laptop’s bottom case from scratches and reduce vibration noise. Each set includes all necessary feet (typically 5 per MacBook Air model) with pre-applied adhesive for easy, secure installation. The matte black finish blends seamlessly with your MacBook’s original aesthetic. Ideal for restoring worn, missing, or damaged feet—whether due to age, cleaning, or accidental removal—this is a simple, affordable way to maintain your MacBook’s functionality and appearance. Note: Surface must be clean and dry for optimal adhesion. For best results, gently warm the adhesive before applying.
90W Adapter Laptop Charger for Toshiba Satellite L305 L305D L455 L505 L505D L635 L645 L655 L655D L745 L755 L775 L855 L875 A105 A135 C655 C675 C850 C855; PA3714U-1ACA PA5035U-1ACA Power Cord
Philips 27E1N5900R 27-inch 4K monitor delivers ultra-clear visuals and modern connectivity for work and creative tasks. It focuses on high resolution, accurate colors, and USB-C convenience for clean setups. Additionally, it features a 27-inch IPS panel with 4K UHD resolution (3840 × 2160). This provides sharp detail and high pixel density, so it improves precision in design, editing, and multitasking. Moreover, it supports VESA DisplayHDR 400. As a result, it enhances brightness, contrast, and color depth for more lifelike visuals. The monitor includes USB-C connectivity with power delivery up to 65W. Therefore, it allows video, data, and charging through a single cable for a clean workspace. In addition, it uses IPS technology with wide 178° viewing angles. This ensures consistent colors and image quality from different positions. Furthermore, it supports MultiView with Picture-in-Picture and Picture-by-Picture. So it enables dual device viewing for efficient multitasking. It also includes LowBlue Mode and Flicker-Free technology. These features reduce eye strain during long working sessions. Philips 27E1N5900R 27-inch 4K monitor provides sharp visuals, flexible Specifications: 27-inch IPS panel with 3840 × 2160 4K UHD resolution DisplayHDR 400 for improved brightness and contrast USB-C with up to 65W power delivery 4ms GtG response time with wide 178° viewing angles MultiView support with PIP and PBP multitasking
Philips 24E2N2100 is a 23.8-inch Full HD IPS monitor designed for smooth visuals and accurate color performance. It supports a 1920 × 1080 resolution with a 120Hz refresh rate and 1ms MPRT response time for fast motion clarity. The IPS panel provides wide viewing angles and consistent image quality. Additionally, it includes Adaptive Sync for reduced screen tearing and smoother gameplay. LowBlue Mode and Flicker-Free technology help reduce eye strain during long sessions. Moreover, HDMI 1.4 and VGA connectivity support standard PC and laptop setups. SmartImage presets adjust display settings based on content type. The Philips 24E2N2100 delivers reliable performance for work, media, and casual gaming. It combines IPS color accuracy with high refresh smoothness for everyday use. Specifications: 23.8-inch IPS display with Full HD 1920 × 1080 resolution 120Hz refresh rate for smoother motion performance 1ms MPRT response time for reduced motion blur Adaptive Sync support for tear-free visuals LowBlue Mode and Flicker-Free technology for eye comfort
The LG UltraGear 27″ 180Hz Curved Monitor is built for gamers who demand smooth visuals and immersive experiences. Its 27-inch curved screen pulls you into the action with an engaging field of view. With a 180Hz refresh rate, this monitor delivers ultra-smooth motion, reducing blur during fast-paced gameplay. The LG UltraGear 27″ 180Hz Curved Monitor also supports high resolution for sharp details and vibrant visuals. Its curved design enhances immersion, making games, movies, and work tasks more enjoyable. The IPS panel ensures accurate colors and wide viewing angles for consistent quality. Additionally, the LG UltraGear 27″ 180Hz Curved Monitor includes AMD FreeSync and NVIDIA G-SYNC compatibility. This reduces tearing and stuttering, ensuring smoother gaming performance. Its low response time allows quick reactions, giving competitive players a clear advantage. With HDR support, the monitor delivers better brightness and contrast for lifelike imagery. The LG UltraGear 27″ 180Hz Curved Monitor also provides multiple connectivity options, including HDMI and DisplayPort. Its ergonomic stand offers height, tilt, and swivel adjustments for comfortable viewing. The slim bezel design gives it a modern look and maximizes screen space. Built-in gaming features like Crosshair and Black Stabilizer improve accuracy and visibility in competitive titles. The LG UltraGear 27″ 180Hz Curved Monitor is not only stylish but also reliable for long hours of use. It is ideal for gamers, streamers, and anyone who values speed and immersion. Ultimately, this monitor offers a perfect balance of performance, design, and comfort. Specifications: Display : 27″ VA Resolution : QHD (2560 x 1440) Refresh Rate : 180Hz Response Rate : 1ms GTG Curvature : 1000R
New A1932 A2179 A2337 DC in Power Jack Connector for Macbook Air 13" Type-C USB-C Power 821-01658-A 2018 2019 2020 Year New A1932 A2179 A2337 DC in Power Jack Connector for Macbook Air 13″ Type-C USB-C Power 821-01658-A 2018 2019 2020 Year About this item New A1932 A2179 A2337 DC Jack Power DC-in Board for MacBook Retina 13″ DC Power Jack Board We have good after-sales services. We share the latest information on laptop spare parts in the Chinese market with all our customers. This is NOT an easy job for someone with no technical skills in Disassembling or Assembling a laptop, So only purchase this item if you know how to install it. Each DC Board is tested before shipping and working.
The MSI PRO MP275 E2 27″ 120Hz Business Monitor is designed for professionals who need a smooth and clear display. It offers excellent visuals, making work more efficient. This 27-inch business monitor features a Full HD resolution of 1920 x 1080 pixels. The large screen provides ample workspace for multitasking and productivity. The 120Hz refresh rate ensures smooth visuals, reducing screen tearing and lag. With Adaptive Sync technology, this monitor delivers a stutter-free experience. It adjusts refresh rates to match the display output. This helps in reducing motion blur, making scrolling and video playback smoother. The MSI PRO MP275 E2 27″ 120Hz Business Monitor has an anti-glare panel, reducing eye strain during long hours of work. It also includes Low Blue Light technology, which minimizes harmful blue light emissions. This makes it ideal for extended screen use. Its wide 178° viewing angles ensure a clear display from any position. The frameless design provides a modern look and allows for a multi-monitor setup without gaps. Connectivity options include HDMI and VGA ports, making it compatible with various devices. It is easy to set up with laptops, desktops, and other office equipment. The MSI PRO MP275 E2 is also VESA-mount compatible, allowing users to mount it on a wall or monitor arm. This helps in creating a clutter-free workspace. With a sleek and professional design, this business monitor is perfect for offices, home setups, and professionals who need a reliable display. Specifications: Display : 27″ IPS Resolution : 1920 x 1080 (FHD) Refresh Rate : 120Hz Response Rate : 1ms
A modern pre-owned Dell Latitude 5420 with 14" display, 11th Gen Core i5, 8GB RAM, and 256GB SSD—delivering reliable performance, enterprise security, and all-day productivity in a compact business laptop.
The Logitech C270 is an affordable, plug-and-play HD webcam delivering 720p video and clear audio—perfect for video calls, remote learning, and everyday communication on Windows, macOS, and ChromeOS. Dual stereo microphones with noise reduction for clearer voice pickup Universal compatibility: Works seamlessly with Zoom, Microsoft Teams, Google Meet, Skype, and more Plug-and-play USB-A connection: No drivers needed—just connect and start your call Adjustable clip-on mount: Fits laptops, LCD monitors, or tripods (tripod not included) Compact, lightweight design with privacy-friendly lens cover (manual)
The BenQ ZOWIE XL2566K TN 360Hz 24.5″ Gaming Monitor is designed for serious gamers. Its 360Hz refresh rate ensures incredibly smooth and fluid motion, reducing blur and ghosting in fast-paced games. With a 24.5″ TN panel, this gaming monitor delivers vibrant colors and sharp images. The TN technology ensures low response times, making it ideal for competitive gaming where every millisecond counts. Setting up the BenQ ZOWIE XL2566K is simple and straightforward. The adjustable stand allows you to find the perfect viewing angle, ensuring comfort during long gaming sessions. Experience the benefits of DyAc+ Technology, which enhances clarity and reduces motion blur. This feature is perfect for first-person shooters and fast-action games, giving you a clear advantage over your opponents. The BenQ ZOWIE XL2566K offers multiple connectivity options, including HDMI, DisplayPort, and USB. This versatility allows you to connect various devices and switch between them with ease. With its Black eQualizer and Color Vibrance settings, you can customize your gaming experience. These features help you spot enemies in dark areas and adjust color settings to suit your preferences. In conclusion, the BenQ ZOWIE XL2566K TN 360Hz 24.5″ Gaming Monitor is a top choice for gamers seeking an edge in performance. Upgrade to this monitor and enjoy ultra-smooth gameplay and exceptional clarity. Elevate your gaming setup today and dominate the competition. Specifications: Display : 24.5″ TN Resolution : 1920 x 1080 Refresh Rate : 360Hz
