The Lenovo ThinkPad P50s is a business-class 15.6-inch mobile workstation that pairs a 6th-generation Intel Core i7 dual-core processor with a dedicated NVIDIA Quadro M500M 2 GB graphics card, 16 GB of RAM and a 256 GB SSD. It’s designed for professionals who need workstation capability in a relatively slim and portable form-factor.
MULTI-FUNCTIONAL: Portable retro speaker, support Bluetooth, 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: Bluetooth speaker has a built-in 1800mAh battery, rechargeable and environmentally friendly, providing 8 hours of battery life, ensuring you can enjoy your favorite music and radio stations for a long time. CLEAR SOUND: The radio speaker’s built-in powerful DSP chip and antenna provide excellent reception, allowing you to experience clear sound. Stations can be easily selected, making it convenient to find your favorite FM channels. POWERFUL: This speaker is compact but with high power, the 5W speaker delivers powerful sound quality. Allows you to enjoy rich and immersive sound, transforming your room into a charming listening environment. RETRO DESIGN: The small FM radio speaker with charming and versatile design incorporates classic aesthetics, making it a delightful addition to your sound collection. For living rooms, bedrooms, parties, etc.
Genuine-spec touchpad flex cable for Apple’s 12-inch MacBook (Model A1534, Early 2015 / Early 2016 / Mid 2017)—essential for restoring full Force Touch trackpad functionality, haptic feedback, and multi-touch gesture support. Compatible With: MacBook 12″ (Early 2015) – 1.1GHz Core M MacBook 12″ (Early 2016) – 1.1GHz/1.3GHz Core M MacBook 12″ (Mid 2017) – 1.2GHz/1.3GHz Core m3/i5/i7 All share Model Number A1534 and Model Identifier MacBook8,1 / MacBook9,1 / MacBook10,1 respectively. MacBook 12″ (Early 2015) – 1.1GHz Core M MacBook 12″ (Early 2016) – 1.1GHz/1.3GHz Core M MacBook 12″ (Mid 2017) – 1.2GHz/1.3GHz Core m3/i5/i7 All share Model Number A1534 and Model Identifier MacBook8,1 / MacBook9,1 / MacBook10,1 respectively. Part Type: Touchpad flex cable only—does not include the trackpad housing, Taptic Engine, or mounting brackets. This is the ribbon cable that connects the Force Touch trackpad to the logic board. Function: Critical for Force Touch functionality—transmits pressure-sensitive input, multi-touch gestures (e.g., pinch, swipe, Force Click), and haptic feedback signals to the Taptic Engine. OEM-Quality Construction: Precisely matches Apple’s original in length, connector pitch, shielding, and routing—ensures reliable signal integrity and compatibility with macOS. Common Use Cases: Replacing a torn, creased, or liquid-damaged flex cable Restoring unresponsive or erratic trackpad behavior Completing a trackpad replacement when the original cable is unusable Replacing a torn, creased, or liquid-damaged flex cable Restoring unresponsive or erratic trackpad behavior Completing a trackpad replacement when the original cable is unusable Installation Note: Requires full bottom case removal and delicate disconnection of the ZIF connector. The cable routes tightly under the battery—extreme care is required. Recommended for experienced or certified technicians only.
lenovo battery L14M3P24 11.1V 45Wh 4050mAh L14M3P24 Battery COMPATIBLE L14S3P24 L14M3P24 L16M3P24 LAPTOP BATTERY FOR LENOVO IDEAPAD XIAOXIN 700 R720 Y700-14ISK Y520-15IKB Y720-14ISK SERIES 4 Cell Laptop Battery About this item Condition: New Voltage: 11.1V Capacity: 45Wh/4050mAh Replace Part Number: L14M3P24 L14S3P24 Fit For: Lenovo Ideapad 700 Ideapad 700 Series The Package Includes 1X L14M3P24 battery. Before purchasing, please open the laptop’s back cover to confirm the battery model and capacity. Raise the battery life: 1:After receiving the battery, Please charge it fully, then discharge it to around 10%, and do it three times. 2:If you don’t use the battery for a long time, please charge and discharge it once a month
Original MacBook Pro 13″ (A2338) Display Assembly in Silver, including LCD, Retina panel, backlight, camera, Wi-Fi antennas, hinges, and aluminum lid. Compatible with M1 MacBook Pro 13″ (2020). Ideal for replacing cracked, damaged, or faulty screens. ✔️ Complete Display Assembly: Includes LCD, digitizer, housing, hinges, webcam, and antenna modules. ✔️ Retina Resolution: 2560 × 1600 native resolution with True Tone support. ✔️ Genuine Fit for A2338: Designed specifically for the MacBook Pro 13″ (A2338) – M1 2020 model. ✔️ Accurate Color & Brightness: 500 nits brightness, P3 wide color gamut, and high contrast. ✔️ Silver Aluminum Finish: OEM-grade aluminum lid matching the original color and texture. ✔️ Plug-and-Play Replacement: No programming required — direct connector compatibility. ✔️ Ideal for Repair: Suitable for replacing damaged, flickering, bleeding, or cracked screens.
Lexar NM620 1TB SSD, M.2 2280 PCIe Gen3x4 NVMe 1.4 Internal SSD, Up to 3500MB/s Read, 3000MB/s Write, 3D NAND Flash Internal Solid State Drive for PC Enthusiasts and Gamers (LNM620X001T-RNNNG) About this item High-speed PCIe Gen3x4 interface: Lexar 1TB SSD up to 3500MB/s read and 3000MB/s write – NVMe 1.4 is supported. Lexar Internal SSD M.2 2280 form factor with 3D NAND Lexar Solid state drive maintains 6x the speed of a SATA-based SSD. Lexar SSD is ideal for PC enthusiasts and gamers. Lexar Internal solid state drive is shock and vibration-resistant without moving parts.
WIWU S400 Aluminum Laptop Stand Portable, Adjustable and Foldable - Silver WIWU S400 Aluminum Laptop Stand Portable, Adjustable and Foldable – Silver
Remax F21 Ruiyal Series – Oscillating water‑cooling fan with 4,000 mAh battery, digital display, and 6 wind levels.Portable and stylish small-table fan with 3 oscillation modes and mist spray cooling. Model: Remax F21 Ruiyal Series Water‑Cooling Oscillating Fan (White) Battery & Power: Built‑in 4,000 mAh battery; USB‑C rechargeable (details unspecified) Cooling Method: Water‑cooling spray system with turbine-style fan blades Wind Speed: 6 adjustable speed levels Oscillation: 3 movement modes—approx. 45°, 90°, or 120° Display & Controls: Digital display showing mode, speed, and battery indicators Dimensions & Weight: Compact tabletop size, ~868 g Power Consumption: Around 8W rated power
Get fully equipped with the Fantech P31 Hero Bundle, featuring a high-performance K515 Shikari RGB Keyboard, a precision VX9 Kanata Gaming Mouse, and a high-traction Vigil MP356 Mousepad. This all-in-one starter kit is designed to deliver a professional gaming experience with stunning RGB aesthetics and reliable durability. The Fantech P31 Hero Bundle is the ultimate “ready-to-play” solution for gamers who want quality peripherals in one cohesive package. Centered around the Shikari K515 membrane keyboard and the lightweight Kanata VX9 mouse, this bundle provides the tactile feedback and tracking precision needed for competitive gaming. Completing the setup is the Vigil MP356 control-type mousepad, ensuring your movements are smooth, stable, and accurate. K515 Shikari RGB Keyboard: A full-sized 104-key membrane keyboard featuring 6-key anti-ghosting and vibrant rainbow RGB illumination. Its floating keycap design is both stylish and easy to clean. Kanata VX9 Gaming Mouse: Lightweight (77g) and ergonomic, the VX9 is equipped with a high-accuracy sensor adjustable from 400 to 3,600 DPI, Huano switches rated for 5 million clicks, and 7 dynamic lighting effects. Vigil MP356 Mousepad: A premium control-surface mousepad (350x300mm) with anti-fray stitched edges and a non-slip rubber base to keep your gear firmly in place during intense matches. Plug & Play Simplicity: No complex drivers needed; simply plug into your USB ports and start gaming immediately across Windows or macOS systems. Integrated Multimedia Controls: Easily manage your volume and media playback directly from the keyboard without tabbing out of your game. Keyboard Model: K515 Shikari (Membrane, 104 Keys, RGB) Mouse Model: Kanata VX9 (Optical, 400–3,600 DPI, 7 Buttons) Mousepad Model: Vigil MP356 (Control Surface, 350 x 300 x 4mm) Interface: USB 2.0 Wired Cable Length: 1.8m (Mouse) / 1.5m (Keyboard) Compatibility: Windows 7/8/10/11, macOS, Linux 1 x K515 Shikari Gaming Keyboard 1 x Kanata VX9 Gaming Mouse 1 x Vigil MP356 Mousepad User Manuals
Genuine-spec Touch Bar assembly with integrated flex cable for MacBook Pro 15″ (Models A1706 – 2017 and A1989 – 2018)—fully restores dynamic Touch ID, system controls, and app-specific functions with OEM-level fit and reliability. Compatible With: MacBook Pro 15″ (2017) – Model A1706 (Intel Core i7/i9, 4 Thunderbolt 3 ports) MacBook Pro 15″ (2018) – Model A1989 (Intel Core i7/i9, 4 Thunderbolt 3 ports) MacBook Pro 15″ (2017) – Model A1706 (Intel Core i7/i9, 4 Thunderbolt 3 ports) MacBook Pro 15″ (2018) – Model A1989 (Intel Core i7/i9, 4 Thunderbolt 3 ports) Includes: Complete Touch Bar module with pre-attached flex cable, integrated Touch ID sensor (doubles as power button), and ambient light sensor—ready for direct connection to the logic board. Full Functionality: Restores all Touch Bar features including dynamic app controls, system brightness/volume sliders, Siri, and fingerprint authentication via Touch ID. Color Match: Available in Space Gray and Silver—select the finish that matches your MacBook’s top case. OEM-Quality Build: Matches Apple’s original dimensions, sensor alignment, and surface texture—ensures seamless integration with macOS and consistent responsiveness. Installation Note: Requires full top case disassembly. The flex cable routes under the left speaker and connects near the logic board—precision is critical to avoid damage. Recommended for experienced technicians.
OEM-quality trackpad replacement (without flex cable) for MacBook Air 13″ (Model A1932, 2018–2019) in Gold finish—engineered for precise Force Touch response, smooth multi-touch gestures, and perfect color-matched integration with the original chassis. Compatible With: MacBook Air 13-inch (2018 & 2019, Model A1932, Model Identifiers MacBookAir8,1) with Intel Core i5/i7 processors. 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. Finish: Gold—specifically matched to the Gold variant of the A1932 MacBook Air for seamless aesthetic continuity. Force Touch Support: Fully compatible with pressure-sensitive input and haptic feedback when paired with the original Taptic Engine and logic board—ensuring full macOS gesture functionality (e.g., Force Click, Look Up, pressure-sensitive navigation). Precision Build: Smooth glass surface with exact curvature, texture, and micro-click mechanism matching Apple’s original design for consistent tracking accuracy and tactile feel. Installation Requirements: Requires full bottom case disassembly and careful transfer of the original flex cable and Taptic Engine. Adhesive must be applied precisely to maintain structural integrity and sensor alignment. Recommended for professional or experienced repair technicians only.
SCREEN LG 24″ FHD Borderless IPS 100HZ 5MS with FreeSync™ LG-24MR400-B SCREEN LG 24″ FHD Borderless IPS 100HZ 5MS with FreeSync™ LG-24MR400-B Technical Details
Replacement DC in Power Jack Connector I/O USB-C Board Charging Port Compatible with MacBook Pro 13" 15" 16" Model A1989 A1990 A2141 A2159 A2251 A2289 A2338 Mid 2018-2020 Replacement DC in Power Jack Connector I/O USB-C Board Charging Port Compatible with MacBook Pro 13″ 15″ 16″ Model A1989 A1990 A2141 A2159 A2251 A2289 A2338 Mid 2018-2020 About this item If your USB-C ports aren’t functioning properly, replacing this board is a good place to start. These are also referred to as Thunderbolt 3 ports. Please double-check the pictures and model numbers to see if they fit your laptop to avoid buying mistakes. Package: 1PCS Type-C/USB-C DC Power Jack I/O Board. We are committed to providing a better shopping experience for our customers, if you have any questions, you can always contact us.
BATTERY ASUS A41-X550E X450 X450e X450j X450jf X550e X550z X550za X750j X750ja X751 X751m A450j A450jf A450e F751la F751ma F751mj R751 R752 F751 K751 P750L P750L Series About this item Gomarty:100% Brand NEW, Battery Type: Li-ion Voltage: 15V Capacity: 2600MAH Cells: 4-cell Color: Black, High-Quality Battery for ASUS; Gomarty has registered a U.S. Trademark and the serial number is 87155272 Battery Models: A41-X550E Laptop Battery for Asus X450 X450E X450J X450JF X751M X751MA-DB01Q X751MA X751L X750JA This laptop Battery works with ASUS D451V D451E K450V K550E K550D K550DP F450 F450C F450V F450E F450J F450JF F751 F751L F751LA F751LAV F751LB F751LD F751LDV F751LJ F751LK F751LN F751LX F751M F751MA F751MD F751MJ A450 A450C A450V A450E A450J A450JF Series 0B110-00220000M. Grade A cells ensure fast charges and low power consumption, while built-in circuit protection ensures safety and stability. Customer Questions: If you have any questions, you can contact us. We will respond within 24 hours.
Genuine-spec touchpad flex cable for MacBook Pro 13″ (Model A1502, Mid 2014)—restores full trackpad functionality, including precise cursor control and physical click response. Essential for repairing unresponsive or erratic trackpad behavior. Compatible With: MacBook Pro 13-inch (Mid 2014, Model A1502, Model Identifier MacBookPro11,1) with Intel Core i5/i7 processors and Retina display. Part Type: Touchpad flex cable only — does not include the trackpad housing, button mechanism, or mounting hardware. This is the ribbon cable that connects the trackpad to the logic board. Function: Transmits cursor movement and click signals (left/right physical clicks) Supports standard multi-touch gestures (two-finger scroll, tap-to-click, pinch-to-zoom) ⚠️ Note: This model uses a physical click mechanism—not Force Touch (no haptic feedback or pressure sensitivity). Transmits cursor movement and click signals (left/right physical clicks) Supports standard multi-touch gestures (two-finger scroll, tap-to-click, pinch-to-zoom) ⚠️ Note: This model uses a physical click mechanism—not Force Touch (no haptic feedback or pressure sensitivity). OEM-Quality Build: Matches Apple’s original in: Cable length and routing path Connector type and pin alignment Insulation and flexibility for long-term reliability Cable length and routing path Connector type and pin alignment Insulation and flexibility for long-term reliability Common Use Cases: Replacing a torn, frayed, or corroded original flex cable Fixing: Unresponsive or intermittent trackpad Cursor jumping or drifting Click function failure (left or right) Complete trackpad disconnect Replacing a torn, frayed, or corroded original flex cable Fixing: Unresponsive or intermittent trackpad Cursor jumping or drifting Click function failure (left or right) Complete trackpad disconnect Unresponsive or intermittent trackpad Cursor jumping or drifting Click function failure (left or right) Complete trackpad disconnect Installation Note: Requires bottom case removal and battery disconnect. Connects via a ZIF (Zero Insertion Force) socket on the logic board—do not force. Cable routes under the battery; handle with care to avoid strain. Suitable for intermediate to advanced DIYers or technicians. Requires bottom case removal and battery disconnect. Connects via a ZIF (Zero Insertion Force) socket on the logic board—do not force. Cable routes under the battery; handle with care to avoid strain. Suitable for intermediate to advanced DIYers or technicians.
Ultra Thin Arabic Keyboard Cover Skin for MacBook Pro 13 Inch 2022 2021 2020 (Apple M2 Chip/Apple M1 Chip A2338/A2289/A2251) and 2019 MacBook Pro 16 Inch (Model A2141) Protector (Black) Ultra Thin Arabic Keyboard Cover Skin for MacBook Pro 13 Inch 2022 2021 2020 (Apple M2 Chip/Apple M1 Chip A2338/A2289/A2251) and 2019 MacBook Pro 16 Inch (Model A2141) Protector (Black) About this item [√] COMPATIBLE WITH: (1) 2022 MacBook Pro 13-Inch with Apple M2 processor, (2) MacBook Pro 13-Inch 2021 2020 with Apple M1 processor (model: A2338), (3) MacBook Pro 13-Inch Early 2020 released (model: A2289/A2251) and (4) 2019 MacBook Pro 16-Inch (model: A2141) [√] MORE PROTECTION for KEYBOARD: waterproof, dust-proof and dirt-proof design can prevent liquid, dust, cigarette ash, biscuit crumbs falling onto your keyboard to affect your keyboard’s life. [√] ACCURATE KEYS: every key is specially molded, manufactured to the quality available. Flexible, this cover is easy to apply and remove for cleaning or disinfecting. [√] 0.26 MM/0.1 IN THICKNESS: ultra thin silicone keyboard cover skin, made it easier for typing. Soft keyboard protector can weaken the sound in typing. [√] 100% CUSTOMER SERVICE and MONEY BACK GUARANTEE: if you are not fully satisfied with the products you received, please feel free to contact us. We will provide you with a 100% customer service and money back guarantee.
256GB SSD Apple Macbook Pro Air 2013 2014 2015 A1502 A1398 A1466 A1465 | Samsung MZ-JPU512T/A06 | 655-1805D ORIGINAL APPLE PART (Apple sources their SSD’s for MacBooks from Samsung) A1502 – A1398 – A1465 – A1466 100% TESTED WORKING Please check compatibility below before you make your purchase: COMPATIBILITY: MacBook Pro Retina Late 2013 – Mid-2015 MacBookPro11,1 (A1502) – ME864LL/A, ME866LL/A, ME867LL/A, MGX72LL/A, MGX92LL/A, & MGXD2LL/A MacBookPro11,2 (A1398) – ME293LL/A & MGXA2LL/A MacBookPro11,3 (A1398) – ME294LL/A, ME874LL/A, MGXC2LL/A, & MGXG2LL/A MacBookPro11,4 (A1398) – MJLQ2LL/A MacBookPro11,5 (A1398) – MJLT2LL/A & MJLU2LL/A MacBookPro12,1 (A1502) – MF839LL/A, MF841LL/A, & MF843LL/A MacBook Air Mid-2013 – Late 2015 MacBookAir6,1 (A1465) – MD711LL/A, MD760LL/A, MD711LL/B, & MF067LL/A MacBookAir6,2 (A1466) – MD760LL/A, MD760LL/B, & MF068LL/A MacBookAir7,1 (A1465) – MJMVM2LL/A MacBookAir7,2 (A1466) – MJVE2LL/A Model Identifier: Samsung Manufacturer Part# MZ-JPU512T/A06
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
Gain the competitive advantage with the Bloody ES7, featuring a high-performance 6000 CPI PixArt Optical Engine. With ultra-fast 1ms click response and customizable 16.8 million color RGB lighting, this mouse is built for gamers who demand precision, speed, and comfort in every match. The A4Tech Bloody ES7 is a professional-grade esports tool designed to translate every hand movement into on-screen action with 1:1 tracking accuracy. Driven by the reliable PixArt Optical Engine, it eliminates “angle snapping” and artificial corrections, ensuring your aim remains raw and precise. Its ergonomic symmetrical shape supports various grip styles, while the anti-sweat matte finish ensures you stay in control even during the most intense gaming sessions. PixArt Optical Engine (6000 CPI): High-precision tracking with 5-level adjustable sensitivity (1000/1200/1600/2000/6000 CPI). Fine-tune your control via software to suit any game genre. Lightning-Fast 1ms Response: Equipped with ahead-of-the-curve technology, the ES7 reacts instantly to your clicks, providing the low-latency performance required for competitive play. Vibrant RGB Lighting: Immerse yourself in your gaming setup with 16.8 million customizable RGB colors and dynamic lighting effects. Customizable “M” Button: The dedicated M button can be programmed via software to execute complex macros or combined functions, putting more power at your fingertips. Extreme Durability: Built to last, the primary buttons are rated for over 10 million clicks, and the high-quality scroll wheel is tested for over 500,000 scrolls. Braided 1.8m Cable: The robust, tangle-free braided cable ensures a stable connection and long-term durability against wear and tear. Sensor: PixArt Optical Engine Resolution: 100 – 6,000 CPI Report Rate: 125 – 1,000 Hz (Adjustable) Key Response: 1 ms Acceleration: 15 g Tracking Speed: 45 ips Frame Speed: 6,000 fps Buttons: 7 Buttons Memory: 256K Onboard Memory Interface: USB Wired (1.8m Cable) System Requirements: Windows 7/8/8.1/10/11 or later Bloody ES7 Esports Gaming Mouse Quick Start Guide
Genuine-spec touchpad flex cable compatible with both MacBook Air A2179 (Intel, 2020) and A2337 (M1, 2020)—restores full Force Touch functionality, haptic feedback, and precise multi-touch gesture control during trackpad repair or replacement. Compatible With: MacBook Air 13″ (2020, Intel) – Model A2179 (Model Identifier: MacBookAir9,1) MacBook Air 13″ (2020, Apple M1) – Model A2337 (Model Identifier: MacBookAir10,1) MacBook Air 13″ (2020, Intel) – Model A2179 (Model Identifier: MacBookAir9,1) MacBook Air 13″ (2020, Apple M1) – Model A2337 (Model Identifier: MacBookAir10,1) ✅ Important Note: Despite different processors (Intel vs. M1), Apple used the same trackpad assembly and flex cable in both A2179 and A2337. This makes the flex cable fully interchangeable between the two models. Part Type: Touchpad flex cable only — does not include the trackpad housing, Taptic Engine, or mounting hardware. This is the OEM-style ribbon cable that connects the trackpad to the logic board. Function: Transmits: Touch input coordinates Force Touch pressure data Haptic feedback signals to the Taptic Engine Enables full macOS gesture support: Force Click, three-finger lookup, swipe navigation, pinch-to-zoom, and smooth cursor tracking. Touch input coordinates Force Touch pressure data Haptic feedback signals to the Taptic Engine Enables full macOS gesture support: Force Click, three-finger lookup, swipe navigation, pinch-to-zoom, and smooth cursor tracking. OEM-Quality Build: Matches Apple’s original specifications in: Cable length and routing path Connector pitch and ZIF latch design EMI shielding and flex durability Cable length and routing path Connector pitch and ZIF latch design EMI shielding and flex durability Common Use Cases: Replacing a torn, creased, or liquid-damaged original flex cable Completing a trackpad replacement when the original cable is compromised Fixing intermittent trackpad behavior, loss of Force Touch, or complete unresponsiveness Replacing a torn, creased, or liquid-damaged original flex cable Completing a trackpad replacement when the original cable is compromised Fixing intermittent trackpad behavior, loss of Force Touch, or complete unresponsiveness Installation Note: Requires full bottom case removal and battery disconnection. Cable routes under the right side of the battery and logic board. Connects via a ZIF (Zero Insertion Force) socket—align carefully and latch gently. Recommended for experienced or certified technicians only. Requires full bottom case removal and battery disconnection. Cable routes under the right side of the battery and logic board. Connects via a ZIF (Zero Insertion Force) socket—align carefully and latch gently. Recommended for experienced or certified technicians only.
