C21N1509 Laptop Battery Replacement for Asus Vivobook X556UA X556UB X556UF X556UJ X556UQ X556UQK X556UR X556UV K556U K556UA K556UB K556UF K556UJ K556UQ K556UR A556U A556UA A556UB A556UF(7.6V 38Wh) About this item Battery Type: Li-ion Voltage: 7.6V Capacity:38Wh Compatible Part Number: C21N1509 C21N15WZ C21PQ9H 0B200-01750000 Fits Model:Asus Vivobook X556 X556U X556UA X556UB X556UF X556UJ X556UQ X556UR X556UV K556 K556U K556UA K556UB K556UF K556UJ K556UQ K556UR K556UV F556U F556UA F556UB F556UF F556UJ F556UQ F556UR F556UV A556U A556UA A556UB A556UF A556UJ A556UQ A556UR A556UV Series New from Manufacturer. CE-/FCC-/RoHS-Certified for safety.
Samsung Lebanon 32″ Flat The Samsung Lebanon 32″ Flat 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. 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. Adaptive Picture Sensational picture, day or night. Surrounding light is detected by a sensor to adjust brightness automatically with Adaptive Picture. Even in broad daylight, watch dark, gritty dramas without squinting and straining your eyes to see the picture. Specifications: Specifications Aspect Ratio16:9 Brightness (Typical)250 cd/㎡ Contrast Ratio Static3,000:1 (Typ.) Resolution1,920 x 1,080 Response Time4ms (GTG) Viewing Angle (H/V)178°/178° 3 year warranty Manufacturer Link
The LG 32MA70HY 32″ Monitor delivers large, clear visuals for work, entertainment, and everyday use.It features a 32‑inch screen with Full HD resolution for sharp images and smooth video.Moreover, the slim design fits well on desks in homes and offices. This monitor uses an IPS panel for wide viewing angles and consistent color from many positions.Additionally, anti‑glare coating helps reduce reflections in bright lighting.Fast response time reduces blur during moving content like videos and casual gaming. The LG 32MA70HY also includes HDMI and VGA ports for flexible connectivity.Furthermore, tilt adjustment lets you find a comfortable viewing angle during long sessions.Low blue light and flicker‑safe features help reduce eye strain during extended use. This display suits students, professionals, and home users alike.Therefore, it supports productivity, media viewing, and everyday computing.Finally, it combines solid picture quality, reliable performance, and comfort features. Specifications: 32″ Full HD (1920 × 1080) IPS panel HDMI + VGA ports for PC and device connection Anti‑glare coating for comfortable viewing Tilt‑adjustable stand for ergonomic use Low blue light and flicker‑safe eye care
AOC Q27P3CW 27″ QHD monitor with webcam delivers a professional workspace solution with sharp visuals, built-in communication tools, and modern connectivity. It is designed for productivity, remote work, and multitasking environments. Additionally, it features a 27-inch QHD IPS display. This display provides 2560 × 1440 resolution, so it delivers clear detail and accurate colors for work and media. Moreover, it includes a 100Hz refresh rate and 4ms response time. As a result, it ensures smooth visuals and responsive performance during daily tasks. The monitor integrates a 5MP webcam with Windows Hello support. Therefore, it enables secure login and high-quality video calls without extra accessories. In addition, it offers USB-C connectivity with power delivery up to 90W. This allows a single cable to handle display, data, and charging for compatible laptops. Furthermore, it includes built-in dual 5W speakers, USB hub, RJ-45 Ethernet, and multiple display outputs. These features improve workspace efficiency and reduce cable clutter. AOC Q27P3CW 27″ QHD monitor with webcam provides a complete all-in-one display solution for professionals who need clarity, connectivity, and integrated communication tools. Specifications: 27-inch QHD IPS display with 2560 × 1440 resolution 5MP webcam with Windows Hello and built-in microphone USB-C with up to 90W power delivery and data transfer 100Hz refresh rate with 4ms response time Built-in dual 5W speakers, USB hub, and RJ-45 connectivity
About this item Multifunctional: retro portable speaker, supports Bluetooth transmission, U disk, memory card, AUX (connect to MP3, MP4 player, smartphone, PC) to play music. It is easy to enjoy stereo sound for music lovers. Long battery life: the Bluetooth speaker has a built-in 1500 mAh battery, is rechargeable and environmentally friendly, and offers a battery life of 8 hours so that you can enjoy your favorite music and radio stations for a long time. CLEAR SOUND The radio speaker with a built-in powerful DSP chip and antenna ensures excellent reception, allowing you to experience clear sound. The transmitters can be easily selected to find your favorite FM channels. POWERFUL: This wireless speaker is compact, but with high power, the 5W speaker delivers powerful sound quality. Allows you to enjoy the rich and impressive sound and transform your room into an enchanting listening environment. RETRO DESIGN The small wireless FM radio speaker with charming and versatile design combines classic aesthetics and is a delightful addition to your sound collection. Perfect for living room, bedroom, party, etc.
Genuine-spec US layout keyboard replacement for MacBook Pro 13″ (Model A1502, Mid 2014)—featuring durable scissor-switch keys, backlighting, and OEM-fit design for reliable performance and easy installation. Compatible With: MacBook Pro 13-inch (Mid 2014, Model A1502, Model Identifier MacBookPro11,1) with Retina display. Layout: Standard US English (QWERTY) with full-size keys, inverted-T arrow keys, and dedicated function row (F1–F12). Keyboard Type: Traditional scissor-switch mechanism—offers good key travel, tactile feedback, and proven long-term reliability (pre-Butterfly design). Integrated Features: Backlit keys for low-light environments, ambient light sensor compatibility, and original-style ribbon cable connector for direct logic board attachment. Build & Fit: Precision-molded to match Apple’s exact dimensions and mounting points—ensures flush integration into the top case with consistent key alignment. Installation Note: Keyboard is secured with screws and light adhesive—more serviceable than later glued models. Requires top case access and battery disconnection. Suitable for intermediate DIYers or professional technicians.
The MSI MAG 342CQR E2 34″ 180Hz Curved Gaming Monitor is designed to elevate your gaming experience. Its 34-inch ultrawide display with a 3440 x 1440 resolution provides immersive visuals, while the 1500R curvature ensures a comfortable viewing angle. MSI Firstly with a rapid 180Hz refresh rate and 1ms MPRT response time, this monitor delivers smooth and responsive gameplay, ideal for fast-paced genres like FPS and racing games. The VA panel offers a 3000:1 contrast ratio, producing deep blacks and vibrant colors. Furthermore the MSI MAG 342CQR E2 supports HDR Ready technology, enhancing image details and color accuracy. AI Vision technology further improves brightness and color saturation, revealing details in dark scenes. Moreover connectivity options include DisplayPort 1.4a and HDMI 2.0b ports, supporting up to 180Hz and 100Hz refresh rates, respectively. The monitor also features Adaptive Sync technology, reducing screen tearing and stuttering. Also ergonomic adjustments are made easy with tilt, swivel, and height options, ensuring comfort during extended gaming sessions. The monitor’s frameless design and anti-glare coating provide a sleek look and reduce eye strain. In summary, the MSI MAG 342CQR E2 34″ 180Hz Curved Gaming Monitor combines high performance, immersive visuals, and ergonomic design, making it a top choice for gamers seeking a competitive edge. Specifications: Display : 34″ VA Resolution : 3440 x 1440 (UWQHD) Refresh Rate : 180Hz Response Time : 1ms (MPRT) Curvature : Curve 1500R
The LG 24″ FHD IPS 120Hz HDR10 Monitor – Slim Stand | 24U411A-B delivers crisp visuals and smooth motion for work and play. This monitor brings vibrant colors and sharp detail to all your content. Moreover, its 120Hz refresh rate makes motion feel fluid and responsive. Therefore, it suits gamers, students, and home office users alike. First, the full HD resolution ensures clear images on a 24-inch screen. Text looks sharp, videos pop, and games appear more alive. In addition, the IPS panel provides wide viewing angles so colors stay consistent from any seat. This helps when friends or family watch together. Also, the HDR10 support enhances brightness and contrast for richer scenes. Next, the fast 120Hz refresh rate makes motion smooth in games and video. Low frame drops mean play feels more responsive. Meanwhile, everyday tasks like scrolling and navigating menus feel quicker. As a result, overall screen performance feels natural and enjoyable for all day use. The slim stand design saves desk space and adds modern style to your setup. It fits neatly with any décor and keeps the workspace clean. Additionally, tilt adjustments help you find a comfortable viewing angle. This makes long work or play sessions easier on your neck and eyes. Connectivity includes essential ports so you can link laptops, desktops, and consoles easily. Plug and play means simple setup with few steps. Furthermore, built-in speakers provide basic sound without extra devices attached. This gives extra convenience when audio isn’t your main focus. Overall, the LG 24″ FHD IPS 120Hz HDR10 Monitor – Slim Stand | 24U411A-B combines smooth performance, vivid color, and practical design. It offers great value for users who want quality visuals and fluid motion without complexity. Manufacturer link Specifications: Display : 24″ IPS Resolution : 1920 x 1080 Refresh Rate : 120Hz Response Rate : 5ms
The LG 27GS65F-B 27″ 1ms 180Hz Gaming Monitor delivers smooth and responsive performance for gamers and entertainment enthusiasts. Its large 27-inch screen provides an immersive experience with sharp and vibrant visuals, making games, movies, and work more engaging. Moreover, the fast 180Hz refresh rate ensures fluid motion during intense gaming sessions, giving you a competitive advantage. This monitor features a 1ms response time that reduces motion blur and ghosting, allowing for faster reaction times in fast-paced games. Additionally, the display offers accurate colors and wide viewing angles, making it ideal for gaming, creative work, and streaming. Its sleek and modern design complements any gaming setup or home office. The LG 27GS65F-B includes multiple connectivity options, allowing easy connection to PCs, consoles, and other devices. Furthermore, ergonomic tilt adjustments provide comfort during long gaming sessions. Therefore, it is perfect for competitive and casual gamers alike. Finally, it combines fast performance, vivid visuals, and user-friendly design for an excellent gaming experience. Specifications: Display : 27″ VA Resolution : QHD (2560 x 1440) Refresh Rate : 180Hz Response Rate : 1ms GTG Curvature : 1000R
A compact and durable pre-owned Dell Latitude 7480 with 14" display, 6th Gen Core i5, 8GB RAM, and 128GB SSD—ideal for light office tasks, students, or as a secure secondary business device.
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
Arabic Silicone Keyboard Skin Cover for MacBook Pro 13" A1708 Without Touch bar and MacBook 12" A1534 with Retina Display US Layout (Black) Arabic Silicone Keyboard Skin Cover for MacBook Pro 13″ A1708 Without Touch bar and MacBook 12″ A1534 with Retina Display US Layout (Black) About this item Arabic language silicone keyboard skin, US version, perfect fit for your MacBook 12″ A1534, which was released in 2015 & new MacBook Pro 13-Inch 13″ Model A1708 without/no Touch Bar, which was released in 2016; Do not fit for Europe Version MacBook Handmade Skin – XSKN is the original Manufacturer of these “Keyboard Art Skin” silicone covers. They are durable, thin and soft with a cashmere feel. The keys fit snug over the keyboard, smooth surface treatment, suit for regular laptop user who types a lot and quickly Each XSKN silicone skin is heat molded to ensure, each color is paints taking hand screened using silicone paint which is heat fuses into the silicone keyboard skin to become one, making it Soft, ultra-thin, durable and easy to washable High quality silicone raw material assure no extension with longtime using. Every detail clearly prinited, imported ink keep it looking good, rubber coating help to remain in good condition Aside from being beautiful they protect your keyboard from spills, crumbs, animal hair and dust. Washable, can be cleaned easily
The Lenovo ThinkVision T24d‑30 is a 24″ WUXGA (1920×1200) IPS monitor designed for professional and office use. It delivers crisp detail with a 16:10 aspect ratio and broad viewing angles. The panel features anti‑glare treatment and 300 cd/m² brightness to support long work sessions with reduced eye strain. This monitor includes diverse connectivity with HDMI, DisplayPort, and VGA inputs. It also offers a built‑in USB hub and integrated stereo speakers. Adjustable ergonomics with height, pivot, tilt, and swivel make it easy to position for comfort. The monitor supports VESA mount and includes low blue light and flicker‑free technologies for user comfort. Specifications: 24″ WUXGA (1920×1200) IPS display with 16:10 aspect ratio Anti‑glare panel with 300 cd/m² brightness for clear visuals HDMI, DisplayPort, and VGA inputs for versatile connectivity Built‑in USB hub and integrated stereo speakers Adjustable height, tilt, swivel, and pivot stand with VESA support
The HP Omen 27″ FHD 165Hz Gaming Monitor delivers smooth, sharp visuals for gaming and everyday use. Its Full HD resolution (1920×1080) shows crisp details in games, videos, and work tasks. The 27-inch screen provides ample space for immersive gameplay or multitasking. This helps you stay focused and engaged. Moreover, the HP Omen 27″ FHD 165Hz Gaming Monitor features a fast 165 Hz refresh rate. This high refresh rate makes motion look fluid and clean on screen. Fast-paced games and action scenes appear smoother and more responsive. This reduces blur and improves reaction time during gameplay. In addition, the monitor offers a 1 ms gray-to-gray response time (with overdrive). This helps reduce ghosting and keeps fast movements clear and sharp. Your controls feel more responsive, which is ideal for competitive games. The monitor also supports adaptive sync technology to cut screen tearing and stutter. Furthermore, the HP Omen 27″ FHD 165Hz Gaming Monitor uses an IPS panel that gives wide viewing angles and good color accuracy. Colors stay consistent even when viewed from sides. This helps when you are reading, editing, or sharing your screen with others. Also, the monitor includes eye-comfort features to ease long sessions. A low-blue-light mode helps reduce eye strain during extended gaming or work hours. The anti-glare screen surface helps in bright rooms too. The design of the HP Omen 27″ FHD 165Hz Gaming Monitor is modern and clean with thin bezels. It fits well on desks of different sizes. The stand is adjustable for comfortable viewing angles, and the build feels sturdy and stable. Overall, the HP Omen 27″ FHD 165Hz Gaming Monitor combines speed, clarity, and comfort. It enhances both gaming performance and daily computing tasks. This monitor is ideal for gamers and users wanting a balanced, responsive, and reliable display. Specifications: Display : 27″ IPS Resolution : 1920×1080 Refresh Rate : 165Hz Response Time : 1ms
GAMDIAS XC3 (2g, incl. Cleaning Wipe and Scraper) - Ultimate Performance Thermal Paste for CPU, GPU, consoles, laptops, high thermal conductivity, long durability, non-conductive, non-capacitive GAMDIAS XC3 (2g, incl. Cleaning Wipe and Scraper) – Ultimate Performance Thermal Paste for CPU, GPU, consoles, laptops, high thermal conductivity, long durability, non-conductive, non-capacitive PERFORMANCE THERMAL COMPOUND: XC3 is an easy-to-apply thermal paste that features high-quality thermal compounds with nano-diamond particles that allow excellent conductivity to lower thermals and push your PC to the limit. HIGH THERMAL CONDUCTIVITY: XC3 ensures exceptional heat dissipation by utilizing high conductivity nanoparticles and lowering thermal impedance between the CPU and cooler with its nano-diamond particles. VERSATILE APPLICATION: The compound provides a stable working status from -50°C to 220°C. SAFE AND STABLE: Without electrically conductive materials,the grease eliminates the risk of short-circuiting or discharging. APPLICATION KIT: The paste comes in a luer lock syringe, with a cleaning wipe and scraper included in the product pack for convenience.
The Arzopa A1 is an ultra-slim, lightweight 15.6-inch portable monitor engineered for seamless travel productivity and entertainment. Delivering crisp Full HD imagery on a premium IPS panel with integrated eye care features, it provides a hassle-free plug-and-play experience using dual full-function USB-C and Mini HDMI inputs. Complete with a built-in adjustable kickstand, it is the perfect dual-screen companion for laptops, smartphones, and gaming consoles. ✅ Full Specifications: Model: ARZOPA Type-C Portable Monitor (ARZOPA-A1) Interface / Connection: Multi-Port Input Panel: 2 x USB Type-C Full Function Ports (Supports concurrent video transmission, data, and power delivery) 1 x Mini HDMI Port (Video signal input only) 1 x 3.5mm Headphone / Audio Output Interface Interface / Connection: Multi-Port Input Panel: 2 x USB Type-C Full Function Ports (Supports concurrent video transmission, data, and power delivery) 1 x Mini HDMI Port (Video signal input only) 1 x 3.5mm Headphone / Audio Output Interface Performance / Screen Quality: Panel Type: IPS (In-Plane Switching) display with 178° wide viewing angles Resolution: Full HD 1920 x 1080p Refresh Rate: 60Hz Aspect Ratio: 16:9 Brightness: 300 cd/m² Contrast Ratio: 1200:1 Display Colors: 262K (8-bit) Color Gamut: 45% NTSC / 72% sRGB space coverage Performance / Screen Quality: Panel Type: IPS (In-Plane Switching) display with 178° wide viewing angles Resolution: Full HD 1920 x 1080p Refresh Rate: 60Hz Aspect Ratio: 16:9 Brightness: 300 cd/m² Contrast Ratio: 1200:1 Display Colors: 262K (8-bit) Color Gamut: 45% NTSC / 72% sRGB space coverage Display Technology: Features built-in HDR rendering technology to boost dynamic contrast alongside a Low Blue Light comfort filter to reduce eye fatigue. Audio: Dual built-in stereo speakers (1W x 2 configuration). Material & Build: Premium, durable metal housing constructed out of a sleek aluminum alloy framework. Design & Form Factor: Ultra-thin bezel layout boasting an integrated adjustable smart kickstand for multi-angle landscape deployment. Power Setup: Driverless plug-and-play architecture. Operates without an internal battery; runs on host device power distribution via USB-C or requires an external 5V/3A power input adapter. Compatibility: Fully compatible with MacBooks, Windows PCs/Laptops, Chromebooks, USB-C supported Android smartphones, and modern gaming consoles (Nintendo Switch, Xbox Series X/S, PS4, PS5). Dimensions: Approx. 355.6 x 220.9 x 9.14 mm (Ultra-slim 0.36-inch profile) Weight: Approx. 725 to 735 grams (1.6 lbs lightweight chassis)
The BenQ Zowie 24″ 144Hz Gaming Monitor is designed for competitive gamers seeking smooth and responsive gameplay. With a 144Hz refresh rate, it reduces motion blur and ensures fluid visuals, giving players a competitive edge. As a result, fast-paced games feel more precise and immersive. Equipped with an optimized response time, this monitor minimizes input lag, allowing accurate control for first-person shooters, MOBAs, and action games. In addition, its 24-inch panel delivers vivid colors and sharp details, enhancing both gaming and multimedia experiences. The ergonomic design includes height, tilt, and swivel adjustments, providing comfortable viewing during long sessions. Furthermore, the monitor features low blue light and flicker-free technology, reducing eye strain over extended playtime. Connectivity is versatile with DisplayPort and HDMI options, making it compatible with PCs and consoles alike. Moreover, the monitor’s minimalist design complements any gaming setup without distractions. Therefore, it suits both professional eSports players and casual gamers who demand performance and reliability. Overall, the BenQ Zowie 24″ 144Hz Gaming Monitor balances speed, visual clarity, and ergonomic comfort, making it a top choice for competitive and everyday gaming. Specifications: Display : 24″ Resolution : FHD Refresh Rate : 144Hz
HP Color Laser 178nw All-in-One Wireless Color Laser Print, Scan & Copy with Built-in Ethernet and Wi-fi Direct, Smallest Color Laser in its Class
The Asus TUF Gaming VG24VQER 24″ FHD 180Hz Curved Monitor offers smooth and responsive gameplay. It delivers sharp Full HD visuals with strong clarity. The curved screen pulls you into the action. This creates a more immersive gaming experience. Moreover, the Asus TUF Gaming 24″ FHD 180Hz Curved Monitor features a fast 180Hz refresh rate. This reduces motion blur during fast scenes. It also improves reaction time in competitive games. Every frame appears clean and stable. In addition, the monitor includes Adaptive Sync support. This helps remove screen tearing and stuttering. Your gameplay stays smooth even during heavy movement. This makes every moment feel more controlled. Furthermore, the Asus TUF Gaming VG24VQER 24″ FHD 180Hz Curved Monitor offers a curved VA panel. The colors look rich and deep on the screen. The contrast levels stay strong during dark scenes. This enhances your overall viewing quality. Also, the monitor features eye-care technology. It reduces blue light and screen flicker. This helps protect your eyes during long gaming hours. You can play or work more comfortably. The design of the Asus TUF Gaming 24″ FHD 180Hz Curved Monitor looks modern and clean. The stand feels stable and adjustable. You can tilt the screen for better viewing comfort. This makes it great for gaming desks and home setups. Overall, the Asus TUF Gaming VG24VQER 24″ FHD 180Hz Curved Monitor delivers smooth motion, bright visuals, and immersive gameplay. It offers strong performance for competitive players. It is an excellent option for gamers who want speed, comfort, and quality in one monitor. Specifications: Display : 24″ VA Resolution : FHD Refresh Rate : 180Hz Response Time : 1ms Curvature : 1500R
The MSI G32C4X 32″ Monitor delivers ultra-smooth and immersive visuals for gaming and entertainment.It features a 32-inch Full HD curved display that enhances immersion and provides a wide field of view. Moreover, its 250Hz refresh rate ensures extremely smooth motion during fast-paced games. This monitor uses a VA panel for strong contrast and deep colors. Additionally, the fast response time reduces blur and ghosting for competitive gaming. The anti-glare screen helps minimize reflections in bright rooms. HDMI and DisplayPort inputs allow easy connection to gaming PCs and consoles. Furthermore, the curved design and tilt adjustment help you maintain a comfortable viewing angle during long sessions. Low blue light and flicker-free technologies reduce eye strain during extended use. This display is ideal for gamers, esports enthusiasts, and home users alike. Therefore, it supports competitive gaming, streaming, and everyday computing. Finally, it combines fast performance, immersive visuals, and comfort features for daily use. Specifications: Display : 31.5″ VA Resolution : 1920 x 1080 (FHD) Refresh Rate : 250Hz Response Rate : 1ms Curvature : 1500R
