Arabic MacBook Pro Keyboard Cover 2023 2022 14 inch A2779 A2442 - Pro 16 inch A2780 A2485 M1-2022 MacBook Air Keyboard Cover 13.6 inch M2 A2681 Silicone Skin Ultra Thin, Arabic Language Arabic MacBook Pro Keyboard Cover 2023 2022 14 inch A2779 A2442 – Pro 16 inch A2780 A2485 M1-2022 MacBook Air Keyboard Cover 13.6 inch M2 A2681 Silicone Skin Ultra Thin, Arabic Language About this item Arabic Keyboard Layout Fits Perfectly 2023 MacBook Pro 14 inch keyboard cover A2779 A2442 M1 Pro Max Chip and Pro 16 inch A2780 A2485 2022 MacBook Air M2 keyboard skin A2681. Kuzy Mac keyboard cover have been engineered to fit snugly onto the low profile keyboard We employed the best industry standards in this Mac Book keyboard cover. Kuzy laptop keyboard covers made out of High Elastic Silicon. Every key is individually molded for a long lasting professional look. Advanced Spill and Dust Protection Soft Flexible and Washable Silicone keyboard skin makes typing quiet and soft to the touch. Flexible, environmentally smart keyboard protector design lets you roll up the MacBook keyboard cover for storage and travel. Quickly apply and remove Keyboard Cover Compatible with 14 inch MacBook Pro model A2779 A2442 also 16 inch MacBook Pro A2780 A2485 and 13.6 inch MacBook Air A2681. Maintain the longevity of your Apple device by eliminating key wear and tear with Kuzy computer keyboard covers
REMAX RB-M73 5.3 VENATTLE SERIES WIRELESS PORTABLE MUSIC WAR DRUM SPEAKER Powerful Sound with 60W Speaker: Experience room-filling, dynamic sound that captures every musical detail. Dynamic Audio Drivers: Dual bass speakers and tweeters harmonize for highs and lows that sing.** TWS Interconnection: Sync over a thousand units for simultaneous audio bliss. Dynamic RGB Lighting: Watch your music dance with multi-color lights synced to every beat. Emergency Power Backup: Stay charged with convenient USB charging capabilities for those critical moments.**
MARSRIVA Smart Mini DC UPS KP2 Series | 18 Watts 10000mAh | 0ms AC to DC Transfer | Flame Retardant | Wall Mount Slots | 1 x Passive PoE, 2 x DC and 1 x USB Output Ports | KP2 BLACK Keep Wi-Fi Power On Output:18W (Max.) or 30W (Max.) ● With 1 * Passive PoE, 2 * DC and 1 * USB output ports, DC UPS can power up multiple devices simultaneously. ● AC to DC 0ms transfer technology keeps your devices working when electricity is ON/OFF shifting. ● With wall-mount slots on the back, DC UPS can be mounted on the wall easily. ● Air cooling system provides maximum heat dissipation, ensuring the long-term stability of UPS. ● V-0 flame retardant product housing secures you and your property. ● 16000mAh high-capacity battery (KP2 Plus, KP2 Ultra) provides longer backup time. ● 30W high-power output (KP2 Pro, KP2 Ultra) provides better compatibility.
Are you in search of a gaming monitor that takes your gaming experience to the next level? Look no further than the Samsung 32″ 165Hz Gaming Monitor. This monitor is packed with features that deliver smooth gameplay and stunning visuals, making it the perfect choice for gamers. Transitioning to its core, the Samsung Gaming Monitor boasts a high refresh rate of 165Hz, ensuring fluid motion and reduced screen tearing for an ultra-smooth gaming experience. Whether you’re playing fast-paced action games or immersing yourself in the latest AAA titles, this monitor keeps up with the action without missing a beat. Its 32-inch display provides ample screen real estate for immersive gaming sessions. With vibrant colors and crisp details, every game comes to life on this monitor, pulling you into the heart of the action. Furthermore, the Samsung 32″ 165Hz Gaming Monitor features a sleek and modern design that complements any gaming setup. With slim bezels and a minimalist aesthetic, this monitor not only enhances your gaming experience but also adds a touch of style to your gaming rig. Connectivity is key, and this monitor offers a range of ports including HDMI and DisplayPort, allowing you to connect to your gaming PC, console, and other devices with ease. Whether you’re gaming solo or with friends, stay connected and ready to play at a moment’s notice. In summary, the Samsung 32″ 165Hz Gaming Monitor is the ultimate choice for gamers seeking high performance and immersive visuals. Upgrade your gaming setup today and experience gaming like never before with this top-of-the-line monitor. Specifications: Display : 32″ IPS Resolution : 2,560 x 1,440 Refresh Rate : 165Hz Response Rate : 1ms (GTG)
The Lenovo Legion R45w-30 44.5″ Dual QHD Gaming Monitor gives you a massive, ultra-wide screen for gaming, work, and media. Its 44.5-inch curved panel wraps around your view for full immersion. The Dual QHD resolution (5120 × 1440) delivers sharp, detailed images and wide viewing space. This helps games and content feel vivid and real. Moreover, the Lenovo Legion R45w-30 44.5″ Dual QHD Gaming Monitor uses a fast 165 Hz refresh rate — and can overclock up to 170 Hz for ultra-smoother motion. Fast movements and animations appear smooth and fluid. In addition, the monitor features a VA panel with strong contrast (3000:1), deep colors, and wide viewing angles. Colors stay rich and natural even from side angles. It supports 99% sRGB and wide-gamut coverage, ideal for gaming, creative work, and media editing. The 1500R curve and anti-glare surface improve comfort and immersion. Furthermore, the Lenovo Legion R45w-30 44.5″ Dual QHD Gaming Monitor includes modern connectivity. It offers HDMI 2.1, DisplayPort 1.4, USB-C (with power delivery and data), USB hub ports, and even Ethernet. Also, the monitor adds useful features like built-in speakers, adaptive sync (AMD FreeSync Premium Pro), HDR support (DisplayHDR 400), and ergonomic stand adjustments. The stand allows height, tilt, and swivel changes for comfortable setup. Its curved, wide display boosts productivity, creativity, and gaming immersion. Overall, the Lenovo Legion R45w-30 44.5″ Dual QHD Gaming Monitor blends size, speed, clarity, and flexibility into one powerful screen. It transforms your PC into a wide, immersive workstation or gaming setup. This monitor is perfect for gamers, creators, and multitaskers who want maximum space and smooth performance. Specifications: Display : 44.5″ VA Resolution : 5120×1440 Refresh Rate : 165Hz Response Time : 1ms Curvature : 1500R
The ViewSonic VG2409-MHU 24″ FHD 75Hz Monitor delivers clear and smooth visuals for work and daily use. Its Full HD resolution shows sharp text and clean image details. The 24-inch screen gives enough space for multitasking and focused tasks. This makes it perfect for home and office setups. Moreover, the ViewSonic VG2409-MHU 24″ FHD 75Hz Monitor features a smooth 75 Hz refresh rate. This makes scrolling softer and video playback more fluid. Motion feels more natural during daily use. As a result, eye comfort improves during long work sessions. In addition, the monitor uses an IPS panel for wide viewing angles. Colors stay clear and accurate from different positions. This helps when sharing the screen with others. The image stays stable and bright. Furthermore, the ViewSonic VG2409-MHU 24″ FHD 75Hz Monitor includes eye comfort features for daily protection. The low blue light mode helps reduce eye strain. The flicker-free design supports long viewing hours without discomfort. These features make it suitable for extended use. Also, the monitor offers useful built-in speakers for basic audio needs. This removes the need for external speakers in small setups. Sound is clear for videos, meetings, and casual media use. In addition, the monitor includes flexible connection options. It supports HDMI, DisplayPort, and VGA for wide device compatibility. This allows easy setup with PCs, laptops, and media devices. Switching sources becomes fast and simple. Moreover, the slim bezel design gives a clean and modern look. It fits well in professional and home workspaces. The stand supports tilt adjustment for basic comfort. Wall mounting is also supported for clean desk setups. Overall, the ViewSonic VG2409-MHU 24″ FHD 75Hz Monitor offers clarity, comfort, and smooth daily performance. It supports work, study, and entertainment with ease. This monitor is a great choice for users who want simple performance and reliable quality. Specifications: Display : 24″ IPS Resolution : FHD 1920 x 1080 Refresh Rate : 75Hz Response Time : 5ms
Samsung Lebanon 43″ UHD LS43BM700UMXUE The Samsung Lebanon 43″ UHD Everything you need is right in your screen. Watch, work and chat – all without connecting a separate PC – with Smart Monitor. Your favorite content, productivity and video call apps are built-in. for a simpler and more stylish desk setup that’s a joy to use every time. Smart TV Experience Effortless entertainment. Enjoy Netflix, YouTube and other streaming services by simply connecting the monitor to WiFi. Samsung TV Plus also offers free live and on-demand content with no downloads or sign-up needed. while Universal Guide provides personalized content recommendations. Workspace Experience PC-less. Browse the web, edit documents and work on projects, all without the need for a separate PC. With new Workmode, you can also remotely access another PC, use Microsoft 365 programs and even . connect to Samsung mobile devices with Samsung DeX for seamless working. SlimFit camera Jump into any conversation. The SlimFit camera with tilt functionality allows you to create the perfect angle . while using your favorite video call apps like Google Duo, which can be accessed directly through the monitor. Plus, the camera cover and option to fully detach always protect your privacy. IoT Hub Turn your Smart Monitor into a control center for the home by connecting it to your IoT home products with SmartThings. Relax by turning off the lights, pulling down the blinds and setting the thermostat to the perfect temperature . all with the Smart Monitor for a perfectly relaxed evening. Multiple Voice Assistants With the Far Field Voice feature, activate your voice assistant just by speaking. Directly command the monitor even at a distance – and tell it what you need. It’s as simple as that. The Smart Monitor supports both Bixby and Amazon Alexa. Mobile connectivity Convenient connectivity. With AirPlay integration, you can wirelessly connect Apple devices to the Smart Monitor . and view on a bigger screen. Enjoy your favorite content from an iPhone, iPad. and Mac on the Smart Monitor and even mirror apps, documents, and websites. Specifications: Specifications Screen Size (Class)43 Flat / CurvedFlat Active Display Size (HxV) (mm)941.184×529.416 Aspect Ratio16:9 Panel TypeVA Brightness (Typical, cd/m2)300 Brightness (Min, cd/m2)240 Contrast Ratio Static5,000:1(Typ.) HDR(High Dynamic Range)HDR10 Resolution3,840 x 2,160 Response Time4ms(GTG) Viewing Angle (H/V)178°(H)/178°(V) Color SupportMax 1B Refresh RateMax 60Hz 3-year warranty Manufacturer Link
Premium bilingual keyboard replacement for MacBook Pro 13″ (A1278, 2009–2012) — choose US/Arabic or UK/Arabic layout. Features durable scissor-switch keys, OEM fit, and clear dual-language legends for seamless typing in English and Arabic. Compatible With: MacBook Pro 13-inch (Model A1278) from Late 2009, Mid 2010, Early 2011, and Mid 2012 (Model Identifiers: MacBookPro5,5, 6,2, 8,1) Layout Options (select at purchase): US/Arabic: Primary legends in Arabic, secondary (top-left) in US QWERTY — includes @, #, and standard US symbols. UK/Arabic: Primary legends in Arabic, secondary in UK QWERTY — includes £ symbol, taller Enter key, and UK-specific punctuation. Both versions feature full Arabic character set US/Arabic: Primary legends in Arabic, secondary (top-left) in US QWERTY — includes @, #, and standard US symbols. UK/Arabic: Primary legends in Arabic, secondary in UK QWERTY — includes £ symbol, taller Enter key, and UK-specific punctuation. Both versions feature full Arabic character set Keyboard Type: Traditional scissor-switch mechanism—reliable, tactile, and serviceable (pre-Butterfly design). Backlighting: Included on Early 2011 and Mid 2012 models only. Keycaps are translucent for even lighting. (Note: Late 2009 & Mid 2010 A1278 models did not support backlighting—keyboard will still function, but lighting requires compatible hardware.) Build & Fit: Precision-molded frame with correct screw mounts and alignment pegs—ensures flush, secure installation in the original top case with no rattling. Installation: Keyboard is screw-mounted (no adhesive)—one of the most DIY-friendly MacBook keyboards. Requires top case access and battery disconnect. Suitable for intermediate users or professionals.
Genuine-quality replacement A1989 battery testing flex cable—brand new and ready for professional MacBook Pro 15" (2018–2019) battery diagnostics and repairs. Genuine-quality replacement A1989 battery testing flex cable—brand new and ready for professional MacBook Pro 15″ (2018–2019) battery diagnostics and repairs. This is a brand-new A1989 Battery Testing Flex Cable, designed specifically for use in MacBook Pro 15-inch models from 2018 and 2019 (A1989) during battery replacement or diagnostic procedures. The flex cable connects the battery to the logic board’s test points, allowing technicians to verify battery health, voltage, and communication before final reassembly—ensuring safe and accurate repairs. Made with high-quality materials and precise engineering, this flex cable matches OEM specifications for fit, function, and reliability. It’s an essential tool for certified repair shops, independent technicians, and advanced DIYers performing battery servicing on T2-chip MacBook Pro models. Please note: This is not a full battery—it is the small flex cable used during battery testing and installation. Proper handling and ESD-safe practices are recommended during installation. Compatible with: MacBook Pro 15″ (2018, A1989) MacBook Pro 15″ (2019, A1989)
The Samsung 85″ QLED Q8F 4K Vision AI Smart TV (2025) | QA85Q8FAAUXTW delivers a premium large-screen entertainment experience with advanced QLED display technology. It produces bright, sharp, and colorful images, so movies, sports, and games look highly immersive on the massive 85-inch screen. QLED technology uses Quantum Dot color enhancement to improve brightness and color accuracy. As a result, visuals appear more vibrant and balanced across both dark and bright scenes. This helps maintain consistent image quality in different lighting conditions. 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 settings. In addition, AI upscaling enhances lower-resolution content closer to 4K quality for better clarity and detail. HDR support expands contrast and color depth, making images more dynamic and lifelike. Fast motion handling also improves clarity, which enhances sports and action content by reducing blur. The Smart TV platform provides 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 Q8F 4K Vision AI Smart TV (2025) | QA85Q8FAAUXTW a modern and premium look suitable for large living spaces. Overall, this Samsung QLED TV combines bright performance, AI optimization, and smart connectivity for an immersive home entertainment experience. Specifications: QLED technology delivers bright and colorful 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
OEM-quality trackpad replacement (without flex cable) for MacBook Air 13″ (Model A2179, 2020)—available in Space Gray and Silver finishes—engineered for precise Force Touch performance, smooth multi-touch gestures, and seamless visual integration. Compatible With: MacBook Air 13-inch (2020, Model A2179) with Intel Core i3/i5/i7 processors (non-M1). 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. Color Options: Space Gray: Matches Space Gray and Midnight finishes Silver: Matches Silver and Starlight finishes (Note: “Z1” typically refers to Apple’s internal regional/part code—this listing covers standard OEM trackpads for A2179.) Space Gray: Matches Space Gray and Midnight finishes Silver: Matches Silver and Starlight finishes (Note: “Z1” typically refers to Apple’s internal regional/part code—this listing covers standard OEM trackpads for A2179.) Force Touch Capable: Fully supports pressure-sensitive input and haptic feedback when paired with the original Taptic Engine and logic board—ensuring full macOS gesture functionality. Precision Build: Mirror-smooth glass surface with exact curvature, texture, and micro-click mechanism matching Apple’s original design for consistent tracking and tactile response. Installation Requirements: Requires full bottom case disassembly and careful transfer of the original flex cable and Taptic Engine. Proper adhesive application is critical for structural integrity and sensor alignment. Recommended for professional or experienced repair technicians only. Important: This is a bare trackpad assembly—not a plug-and-play module. Functionality depends on correct integration with original electronics.
The HP ENVY 27 4K Monitor delivers stunning visuals for work, entertainment, and creative tasks.It features a 27-inch 4K UHD screen that shows sharp details and vivid color.Moreover, the slim profile and modern design look great on any desk. This monitor uses an advanced panel for wide viewing angles and accurate colors.Additionally, 4K resolution makes photos, videos, and text look crisp and lifelike.Anti-glare coating helps reduce reflections in bright lighting. The HP ENVY 27 4K also includes multiple ports like HDMI and DisplayPort for flexible connections.Furthermore, USB-C connectivity supports video, data, and power delivery with one cable.Tilt and height adjustment allow comfortable viewing during long sessions. This display works well for professionals, creators, and home users alike.Therefore, it supports productivity, media editing, and streaming.Finally, it combines high picture quality, versatile connections, and ergonomic features for daily use. Specifications: 27″ 4K UHD (3840 × 2160) display HDMI + DisplayPort + USB-C connectivity Anti-glare panel for clearer viewing Tilt and height adjustable stand Accurate color and wide viewing angles
The MSI MAG 275F 27″ 180Hz Gaming Monitor delivers an immersive gaming experience. With a fast 180Hz refresh rate, it ensures ultra-smooth gameplay. This makes it perfect for competitive gaming and fast-paced action. The 27-inch IPS display offers stunning visuals with vibrant colors and sharp details. It provides a Full HD resolution, making games look crisp and realistic. Wide viewing angles ensure consistent colors from any position. With a 1ms response time, this monitor reduces motion blur and ghosting. Every movement appears clear and precise. This gives you a competitive edge in fast-action games like shooters and racing games. The MSI MAG 275F supports Adaptive Sync technology, eliminating screen tearing and stuttering. This ensures a fluid gaming experience, even in the most intense moments. You’ll enjoy smooth visuals without lag or interruptions. Designed for long gaming sessions, this monitor features anti-flicker and blue light reduction technology. It helps reduce eye strain, allowing you to play comfortably for hours. The adjustable stand lets you set the perfect viewing angle. Connectivity is simple with multiple ports, including HDMI and DisplayPort. You can easily connect your PC, console, or other gaming devices. This makes the MSI MAG 275F a versatile choice for all gamers. With a sleek, modern design, this monitor enhances any gaming setup. It combines performance with style, making it a must-have for serious gamers. Upgrade your gaming experience with the MSI MAG 275F 27″ 180Hz Gaming Monitor today! Specifications: Display : 27″ Rapid IPS Resolution : 1920 x 1080 (FHD) Refresh Rate : 180Hz Response Rate : 0.5ms
Reliable, compact, and business-focused—the Dell Latitude 5310 features a 10th Gen Intel Core i5 processor, 8GB RAM, and a fast 256GB SSD in a lightweight 13.3-inch design built for everyday productivity.
A premium pre-owned Lenovo ThinkPad T590 with a 15.6" display, powerful 8th Gen Core i5 processor, 8GB RAM, and fast 256GB SSD—engineered for professionals who need reliability, security, and all-day productivity.
Samsung Odyssey G5 G50F 32″ QHD Monitor delivers sharp visuals and smooth gameplay for serious gamers. It features a 32-inch 2K flat display with high resolution. As a result, games look more detailed and immersive. Moreover, the VA panel ensures consistent colors and wide viewing angles. It maintains clear visuals from different positions. HDR10 support enhances brightness and contrast for deeper blacks and brighter highlights. Furthermore, the 165Hz refresh rate and 1ms response time reduce motion blur and lag. NVIDIA G-Sync compatibility and AMD FreeSync Premium help deliver smooth and stable frames. Finally, Samsung Odyssey G5 G50F 32″ Monitor includes gaming features like Black Equalizer and Virtual Aim Point. These improve visibility and accuracy. Players gain better control and performance in every match. Specifications: 32-inch QHD (2560×1440) display with sharp visuals and wide viewing angles VA panel ensures consistent colors and clear images from multiple angles 165Hz refresh rate and 1ms response time for smooth, responsive gaming HDR10 support for enhanced brightness, contrast, and realistic visuals Gaming tools like Black Equalizer and Virtual Aim Point for better accuracy
Display Panel Size (inch) : 27 Aspect Ratio : 16:9 Display Viewing Area (H x V) : 597.888 x 336.312 mm Display Surface : Non-Glare Backlight Type : LED Panel Type : IPS Viewing Angle (CR≧10, H/V) : 178°/ 178° Pixel Pitch : 0.311mm Resolution : 1920×1080 Color Space (sRGB) : 100% Brightness (Typ.) : 250cd/㎡ Contrast Ratio (Typ.) : 1000:1 ASUS Smart Contrast Ratio (ASCR) : 100000000:1 Display Colors : 16.7M Response Time : 1ms MPRT Refresh Rate (Max) : 144Hz Flicker-free : Yes Video Feature Trace Free Technology : Yes GameVisual : Yes Color Temp. Selection : Yes(4 modes) GamePlus : Yes HDCP : Yes VRR Technology : FreeSync™ Premium GameFast Input technology : Yes Shadow Boost : Yes Low Blue Light : Yes Audio Feature Speaker : Yes(2Wx2) I/O Ports DisplayPort 1.2 x 1 HDMI(v1.4) x 2 Earphone Jack : Yes Signal Frequency Digital Signal Frequency : HDMI: 30~160 KHz (H) / 48~ 144 Hz (V) DisplayPort: 30~160 KHz (H) / 48~144 Hz (V) Power Consumption Power Consumption : <18W* Power Saving Mode : <0.5W Power Off Mode : <0.3W Voltage : 100-240V, 50/60Hz Mechanical Design Tilt : Yes (+22° ~ -5°) VESA Wall Mounting : 75x75mm Kensington Lock : Yes Dimensions (Esti.) Phys. Dimension with Stand (W x H x D) : 612.6x431x213 mm Phys. Dimension without Stand (W x H x D) : 612.6 x 362.5 x 37.7 mm Box Dimension (W x H x D) : 692 x 499 x 183 mm Weight (Esti.) Net Weight with Stand : 3.9 Kg Net Weight without Stand : 3.5 Kg Gross Weight : 6.1 Kg Accessories (vary by regions) DisplayPort cable HDMI cable Power adapter Power cord Quick start guide Warranty Card 90LM05S1-B01E70 manufacturer link
Laptop Battery for Acer E5-573 Battery for Acer AL15A32, Acer Aspire E5-422, Aspire E5-522, Aspire V3-574 Laptops. About this item Compatible For Preferred Model : Acer Aspire V3-574G E5-473G E5-573G E5-553G E5-522 Warranty Not Covered if Defects due to External Causes, Accidental, Physical or Liquid Damage, Cut, Burnt, Misuse and Missing Warranty Stickers or Labels. Battery Capacity/Power Capability (mAh/Wattage) be different From The Reference Picture But the Backup of the Battery Will Be the Same As the Original Please Match Your Product With The Image Provided Before Placing The Order
Enhance Your Viewing Experience with the HP FHD 27” Monitor | V27i In today’s digital age, having a reliable and clear monitor is essential. The HP FHD 27” Monitor | V27i delivers. Transitioning from your old monitor to the V27i is straightforward, even if you’re not tech-savvy. This 27-inch monitor offers a spacious screen, perfect for work, entertainment, and everyday tasks. Its user-friendly interface ensures anyone can use it without complicated settings. The V27i provides crisp and clear visuals with Full HD resolution, enhancing your viewing experience. With its sleek and minimalist design, it complements any workspace or home setup. The monitor’s energy-efficient design saves power and reduces your environmental impact. In summary, the HP FHD 27” Monitor | V27i offers a simple and impressive solution for your computing needs. Elevate your viewing experience with this accessible and reliable display. you can always check here and if you like to see more options you can always check here! Specifications: HP V27i G5 FHD Monitor (65P64AS) Display size (diagonal) 68.6 cm (27″) Low blue light Yes (TÜV certified) Panel bit depth 8 bit (6 bit + FRC) Pixels per inch (ppi) 82 ppi Resolution (maximum) FHD (1920 x 1080 @ 75 Hz) 1 year warranty
Acer Nitro QG241YBII 23.6 Inch Gaming Monitor LED Full Hd Screen Size 23.8 Inches Display Resolution Maximum 1920×1080 Brand Acer Special Feature Full HD Refresh Rate 75 Hz Specifications: Acer Nitro QG241YBII 23.6 Inch Gaming Monitor LED Full Hd Screen Size 23.8 Inches Display Resolution Maximum 1920×1080 Brand Acer Special Feature Full HD Refresh Rate 75 Hz
