The Samsung 55″ OLED 4K S90F Vision AI Smart TV | QA55S90FAUXTW delivers strong picture quality with OLED technology. It produces deep blacks, bright colors, and high contrast. As a result, movies, sports, and games look more realistic and detailed. The 55-inch size also works well in most rooms while still giving an immersive view. Samsung Vision AI improves both picture and sound in real time. It analyzes what you are watching and adjusts settings automatically. Therefore, brightness, color, and sharpness stay balanced in every scene. In addition, AI upscaling improves lower-resolution content and brings it closer to 4K quality. The OLED panel uses self-lit pixels, so each part of the screen is controlled precisely. This improves dark scenes and keeps bright areas clear. HDR also increases contrast and color depth. As a result, images look more natural and dynamic. Fast motion in sports and action scenes also appears smoother and clearer. The TV runs on Samsung’s Smart TV system, which gives access to streaming apps, games, and smart home control. It is simple to use and responds quickly. In addition, the slim design and thin borders make the screen look modern and clean in any space. Overall, this Samsung OLED TV combines strong picture quality, smart AI features, and easy connectivity. It is designed for users who want a high-quality and smooth entertainment experience at home. Specifications: OLED technology delivers deep blacks, vivid colors, and exceptional contrast Vision AI optimizes picture and sound quality in real time 4K UHD resolution provides sharp and highly detailed visuals HDR support enhances brightness, contrast, and color performance Smart TV platform offers streaming apps and smart home connectivity
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.
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 Lenovo L24E-30 24″ 60Hz Monitor offers a perfect blend of style and performance for your computing needs. Whether you’re working, gaming, or streaming, this monitor delivers an exceptional visual experience. With its 24-inch Full HD display, the Lenovo L24E-30 provides crisp and clear visuals. Enjoy stunning detail and vibrant colors that bring your content to life, whether you’re editing photos or watching videos. The 60Hz refresh rate of the Lenovo L24E-30 ensures smooth and fluid motion, reducing screen tearing and ghosting. This makes it ideal for fast-paced games and dynamic videos, offering a more immersive experience. Designed with a slim and sleek profile, the Lenovo L24E-30 adds a modern touch to any workspace. Its narrow bezels create a seamless multi-monitor setup, allowing you to expand your view effortlessly. Featuring AMD FreeSync technology, the Lenovo L24E-30 synchronizes the monitor’s refresh rate with your graphics card. This reduces screen stuttering and provides a smoother gaming experience, even during intense action scenes. The Lenovo L24E-30 24″ 60Hz Monitor is equipped with multiple connectivity options, including HDMI and VGA ports. This ensures compatibility with a wide range of devices, making it a versatile addition to your setup. For comfortable viewing, the Lenovo L24E-30 includes eye-care features like low blue light and flicker-free technology. These features help reduce eye strain during long hours of use, enhancing your overall comfort. In conclusion, the Lenovo L24E-30 24″ 60Hz Monitor combines stylish design, smooth performance, and eye-care features for an outstanding viewing experience. Upgrade to the Lenovo L24E-30 today and enjoy enhanced productivity and entertainment. Specifications: Display : 24″ VA Resolution : FHD 1920 x 1080 Refresh Rate : 60Hz Response Rate : 4ms
BATTERY DELL M5Y1K Laptop Battery for Dell Inspiron 15 5000 5555 5558 5559 3552 3558 3567 14 3451 3452 3458 5458 17 5755 5758 Series Rechargeable 40WH li-ion Battery Replacement Fit GXVJ3 VN3N0 YU12005-13001D About this item 【Specification】Dell laptop Replacement Battery Type: Li-ion; Voltage: 14.8 V; Capacity 2600MAH/40WH; Cells:4-Cell 【Stability】M5Y1K Laptop Battery Replacement battery for Dell offers 500+ recharge cycles over life of battery 【COMPATIBLE MODEL】(Check description below for more models) Dell 40WH Standard Rechargeable Li-ion Battery Type M5Y1K 14.8V YU12005-13001D 453-BR GXVJ3 HD4J0 M5YIK MSY1K Dell Inspiron 14 15 3000 Laptop Replacement Battery 3558 3458 3567 3452 3565 3459 P60G Dell Inspiron 14 15 17 5000 Laptop Battery 5555 5558 5559 5755 5758 5458 Dell Vostro Laptop Battery 3558 3458 Dell Latitude Laptop Battery 3460 3560 【GUARANTEE】Our Dell M5Y1K replacement laptop battery is 100% Compatible with the originals. Complying with the CE/FCC/ROHS/UL Certified Standard
TT03XL Laptop Battery Compatible with Hp EliteBook 850 G5 850 G6 ZBook 15U G5 15U G6 Series Notebook 932824-2C1 933322-855 932824-421 HSTNN-LB8H HSTNN-DB8K 11.55V 56Wh 4610mAh About this item 【Battery type】Li-ion. Voltage: 11.55V. Capacity: 56Wh 4610mAh. 【Replacement For Laptop】Hp EliteBook 850 G5 G6, ZBook 15U G5 G6 Series . 【Compatible Part Number】TT03XL 932824-2C1 933322-855 932824-421 HSTNN-LB8H HSTNN-DB8K TTO3XL. 【Connector】Before placing your order, Please refer to the picture and check it. Because the products produced by different factories will have differences in size, cable length, interface, etc. 【Use Skills】If the new battery is not recognized during the initial installation, please reinstall and check if the interface is fully connected. Discharge the new battery to 5% (not 0%), then charge and cycle 3-4 times to wake up the new battery.
The AOC 27″ 180Hz Gaming Monitor is designed for serious gamers seeking top-tier performance. Its ultra-fast 180Hz refresh rate ensures smooth and fluid visuals, reducing motion blur for a more immersive gaming experience. Firstly with a 27-inch screen, this gaming monitor offers ample space for your games, providing clear and detailed images. The large display enhances your field of view, making every gaming session more engaging and enjoyable. Furthermore the AOC 27″ 180Hz Gaming Monitor features a Full HD resolution, delivering crisp and sharp visuals. Whether you’re playing fast-paced shooters or exploring open-world adventures, every detail will be displayed with precision. Equipped with Adaptive-Sync technology, this monitor eliminates screen tearing and stuttering, ensuring seamless gameplay. You’ll enjoy a more responsive and visually stunning gaming experience, keeping you competitive in every match. The sleek and modern design of the AOC Gaming Monitor complements any gaming setup. Its slim bezels provide a more immersive viewing experience, allowing you to focus entirely on your game. Connectivity is made easy with multiple input options, including HDMI and DisplayPort. You can easily connect your gaming console, PC, or other devices for versatile use. In conclusion, the AOC 27″ 180Hz Gaming Monitor offers outstanding performance, stunning visuals, and a sleek design. Upgrade your gaming setup with this high-performance monitor and experience games like never before. Specifications: Display : 27″ VA Resolution : 1920×1080 FHD Refresh Rate : 180Hz Response Rate : 1ms
Genuine-spec touchpad flex cable for MacBook Pro 15″ (Model A1706 – 2017 and A1989 – 2018/2019)—restores full Force Touch functionality, haptic feedback, and precise multi-touch gesture control during trackpad repair or replacement. Compatible With: MacBook Pro 15″ (2017) – Model A1706 (Model Identifier: MacBookPro14,3) MacBook Pro 15″ (2018–2019) – Model A1989 (Model Identifier: MacBookPro15,2) ✅ Note: Apple used the same trackpad assembly and flex cable across both A1706 and A1989 15″ models—making this part interchangeable between them. MacBook Pro 15″ (2017) – Model A1706 (Model Identifier: MacBookPro14,3) MacBook Pro 15″ (2018–2019) – Model A1989 (Model Identifier: MacBookPro15,2) ✅ Note: Apple used the same trackpad assembly and flex cable across both A1706 and A1989 15″ models—making this part interchangeable between them. ✅ Note: Apple used the same trackpad assembly and flex cable across both A1706 and A1989 15″ models—making this part interchangeable between them. Part Type: Touchpad flex cable only — does not include the trackpad housing, Taptic Engine, or mounting hardware. This is the OEM-style ribbon cable connecting 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 in: Cable length and routing Connector pitch and ZIF latch design EMI shielding and flex durability Cable length and routing 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.
PCE M8-700 UPS (line-interactive) — 700 VA / 360 W backup unit for 220–240 V input. Protects PCs, routers, small electronics from outages and voltage swings. The PCE M8-700 is a line-interactive UPS designed for home or small office use. It provides backup power, voltage regulation (AVR), surge protection, and supports automatic switching during outages. Ideal for desktop PCs, network gear, monitors, or point-of-sale systems. Features & Capabilities Line-interactive topology: regulates input voltage without switching to battery when voltage fluctuates mildly. Automatic Voltage Regulation (AVR) to correct undervolt/overvolt conditions. Simulated (stepped) sine wave output in battery mode. Surge, overload, short circuit, discharge protections built in. Cold start capability (ability to power on from battery with no mains) LED + audible alarms for status (battery mode, overload, fault) USB / RS232 interface in some variants for power management (shutdown, monitoring) Technical Specifications What “Input 220–240 VAC, 50/60 Hz, 3.7 A” Means (and Caveats) If the specification you’re giving is “3.7 A” at input, that corresponds to a maximum input current draw when the UPS is handling a heavy load or during charging cycles. At 230 V × 3.7 A ≈ 850 W of input capacity. The unit’s 360 W output means there’s overhead for losses, inverter inefficiency, battery charging, etc. The UPS must operate within the stated voltage and frequency ranges — if input is too low or too high, it may switch to battery or go into protection mode.
The Samsung 83-inch TV S90F OLED 4K | QA83S90FAEXTW is a premium large-screen television designed to deliver exceptional picture quality and immersive entertainment. It features advanced OLED technology that produces deep blacks, vibrant colors, and outstanding contrast. In addition, the large 83-inch screen creates a cinematic viewing experience, making movies, sports, and games feel more engaging. Samsung equips this model with an advanced AI-powered processor, and it continuously enhances picture quality in real time. As a result, viewers enjoy sharper details, improved color accuracy, and optimized brightness across different types of content. Furthermore, AI upscaling improves lower-resolution videos, bringing them closer to 4K quality for a more refined viewing experience. The OLED panel controls each pixel independently, so bright highlights and dark scenes appear with remarkable precision. Therefore, images look more realistic and detailed. In addition, HDR support expands contrast and color depth, delivering lifelike visuals with greater dynamic range. Samsung’s Smart TV platform provides easy access to popular streaming applications, gaming features, and smart home controls. Meanwhile, the slim profile and minimal bezel design create a modern appearance that enhances any living room or entertainment space. Overall, the Samsung 83-inch TV S90F OLED 4K | QA83S90FAEXTW combines premium OLED technology, intelligent processing, and advanced smart features. It is an excellent choice for users who want a large-screen home theater experience with impressive picture performance. Specifications: OLED technology delivers deep blacks and exceptional contrast performance 83-inch display creates an immersive cinematic viewing experience AI-powered processor enhances picture quality and content upscaling HDR support improves brightness, color depth, and visual realism Smart TV platform provides streaming apps and connected home features
The Cudy WR1200 AC1200 Router offers flexible networking with its 5-in-1 functionality and dual-band WiFi speeds up to 1200Mbps. Ideal for home and office use, it provides stable connectivity, wide coverage, and multiple operating modes to suit different network needs. AC1200 Dual Band WiFi – Combined speeds of up to 1200Mbps (300Mbps on 2.4GHz + 867Mbps on 5GHz) for smooth browsing, streaming, and gaming. 5-in-1 Multi-Mode Functionality – Works as Router, Access Point, Range Extender, WISP, and Client for maximum flexibility. Wide Coverage – High-gain antennas ensure strong and stable WiFi signal throughout your home or office. Fast Ethernet Ports – Reliable wired connections for computers, smart TVs, and other devices. Easy Setup & Management – Simple configuration through an intuitive web interface. Stable Multi-Device Performance – Designed to handle multiple connected devices efficiently. Secure Network – WPA/WPA2 encryption keeps your connection safe and private. 1 × WAN Port 4 × LAN Ports Dual Band WiFi (2.4GHz & 5GHz) Ethernet (RJ45) Wireless Security (WPA/WPA2)
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
AOC 24G11E 24-inch 180Hz gaming monitor delivers fast and responsive performance for competitive gaming. It focuses on high refresh rate, low response time, and smooth visuals for everyday gameplay. Additionally, it features a 23.8-inch Fast IPS panel with Full HD resolution (1920 × 1080). This panel provides clear visuals and wide viewing angles, so it improves both gaming and general use. Moreover, the monitor supports a 180Hz refresh rate with 0.5ms MPRT response time. As a result, it delivers smooth motion and reduces blur during fast-paced action. The display includes Adaptive Sync technology. Therefore, it reduces screen tearing and stuttering for a more stable gaming experience. In addition, it supports HDR10 and Low Input Lag mode. These features improve visual depth and responsiveness during gameplay. Furthermore, the monitor uses a 3-sided frameless design with HDMI 2.0 and DisplayPort 1.4 connectivity. This setup supports modern PCs and multi-monitor configurations. AOC 24G11E 24-inch 180Hz gaming monitor provides smooth performance, fast response, and essential gaming features for competitive and casual players. Specifications: 23.8-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 Adaptive Sync support for tear-free performance HDMI 2.0 and DisplayPort 1.4 connectivity
Introducing the LG MyView Smart Monitor – your all-in-one display solution for work, entertainment, and everything in between. With its innovative features and user-friendly interface, this monitor redefines convenience and efficiency. First and foremost, versatility is the name of the game. Whether you’re working on spreadsheets, streaming your favorite shows, or gaming with friends, the MyView Smart Monitor adapts effortlessly to your needs. Transitioning between tasks is seamless thanks to its intuitive interface and quick response times. Say goodbye to cluttered desktops and hello to a streamlined workflow that maximizes productivity. Moreover, connectivity options abound. From wireless casting to multiple input ports, the MyView Smart Monitor ensures compatibility with a wide range of devices. Whether you’re using a laptop, tablet, or smartphone, connecting is hassle-free. In addition, ergonomic design features such as adjustable stands and eye-care technology prioritize your comfort and well-being during extended use. Say goodbye to eye strain and discomfort – the MyView Smart Monitor has your back. Furthermore, its sleek and modern design adds a touch of sophistication to any space, whether it’s your home office or entertainment center. Elevate your surroundings with a display that not only performs but also complements your aesthetic. In conclusion, the LG MyView Smart Monitor is more than just a display – it’s a versatile companion that enhances every aspect of your digital life. Experience the convenience, efficiency, and style it brings to the table, and unlock a world of possibilities today. Specifications: Display : 27″ IPS Resolution : 1920 x 1080 Refresh Rate : 60Hz Response Rate : 5ms GTG Speaker : 5W x2
BATTERY DELL RYXXH Laptop Battery Compatible with DELL Latitude E5250 P25S001 Latitude E5450 E5550 DELL Latitude 3150 P21T001 Series Notebook 09P4D2 9P4D2 0YD8XC R5MD0 5TFCY VVXTW VY9ND 38Wh 11.1V About this item 【Basic Details】Item Model: RYXXH ; Battery Type: Li-ion; Voltage: 11.1V; Capacity: 38Wh; Battery Color: Black. 【Compatible P/N 】RYXXH 0RYXXH 9P4D2 R5MD0 YD8XC 5TFCY VVXTW VY9ND 0VY9ND Laptop Battery. 【Compatible Laptop Models】 DELL Latitude 12 5000 Series, DELL Latitude 12 E5250 Series, DELL Latitude E5450 Series, DELL Latitude E5550 Series, DELL Latitude 3150 Series, DELL Latitude 3160 Series. 【Note】The package includes: 1*battery and 1*Instructions. Packaged by sponge or bubbles to prevent damage. Before purchasing, please open the back cover of the laptop to confirm the battery model and shape.
WiWU WM108 Wimice Dual‑Mode Mouse – Bluetooth 5.0 and 2.4 GHz wireless mouse with 800/1200/1600 DPI, silent clicks, and ergonomic ABS housing.Long battery life (~6 months standby), USB dongle & silent design—ideal for travel, office, and quiet environments. Model: WiWU Wimice WM108 Connection Modes: Bluetooth 5.0 2.4 GHz wireless via USB dongle Connection Modes: Bluetooth 5.0 2.4 GHz wireless via USB dongle DPI Settings: 800 / 1,200 / 1,600 DPI (adjustable) Buttons: 3 standard buttons + clickable scroll wheel (4 keys total) Range: Up to 10 m wireless connectivity Material/Design: Lightweight (67–130 g, depending on source), ergonomic ABS plastic body, magnetic base or “super magnetic absorption” design Operating Range: ≈10 m Silent Clicks: Quiet operation—silent key action Dimensions: Approx. 108 × 64 × 36 mm Weight: 67 g cited by Star Tech and 130 g by others—likely lighter in official spec Compatibility: Windows, macOS, Linux, Android, etc. Plug-and-play, no driver needed
The ViewSonic VX3216-2KC-PRO-3 31.5″ 2K 240Hz Curved Gaming Monitor delivers smooth and sharp visuals for fast gaming. Its 2K resolution shows clear detail in games, videos, and creative work. The large 31.5-inch curved screen improves immersion and focus. This helps you feel closer to the action. Moreover, the ViewSonic VX3216-2KC-PRO-3 31.5″ 2K 240Hz Curved Gaming Monitor features a powerful 240 Hz refresh rate. This makes motion extremely smooth during fast scenes. As a result, gameplay looks fluid with less blur. This gives you a competitive edge in fast games. In addition, the monitor offers a very fast response time for quick screen changes. This reduces ghosting and keeps motion sharp. Controls feel more precise and responsive. This helps improve gaming accuracy. Furthermore, the ViewSonic VX3216-2KC-PRO-3 31.5″ 2K 240Hz Curved Gaming Monitor uses a high-contrast VA panel. Blacks appear deep and colors look rich. This makes games and movies more enjoyable. The curved design also improves side viewing comfort. Also, the monitor supports adaptive sync to reduce screen tearing and stuttering. This keeps frames smooth when your system speed changes. As a result, gameplay feels stable and clean. This enhances the overall gaming experience. In addition, the monitor includes modern connection options. It offers DisplayPort and HDMI for easy device setup. You can connect gaming PCs, consoles, and media devices with ease. This adds strong flexibility. Moreover, the stand offers tilt adjustment for viewing comfort. The slim design saves desk space while keeping a bold gaming look. The monitor also supports wall mounting for clean setups. Overall, the ViewSonic VX3216-2KC-PRO-3 31.5″ 2K 240Hz Curved Gaming Monitor delivers speed, clarity, and immersion in one strong display. It improves gaming performance and visual comfort. This monitor is ideal for gamers who want smooth action and large curved visuals. Specifications: Display : 31.5″ Fast VA Resolution : QHD 2560 x 1440 Refresh Rate : 240Hz Response Time : 1ms Curved
WIWU S400 Aluminum Laptop Stand Portable, Adjustable and Foldable - Silver WIWU S400 Aluminum Laptop Stand Portable, Adjustable and Foldable – Silver
A high-efficiency pre-owned HP EliteBook 865 G9 with 16" display, AMD Ryzen 7 6850U, 16GB RAM, 512GB SSD, and integrated AMD Radeon 680M graphics—ideal for business professionals seeking all-day battery life, strong performance, and enterprise security.