Genuine Apple sleep/wake sensor flex cable (Hall effect sensor) for MacBook Air 13.6″ (Model A2681, 2022, M2)—ensures automatic display sleep when the lid is closed and wake-on-open functionality. OEM part number 821-04129-02. Compatible With: MacBook Air 13.6-inch (2022, Model A2681) with Apple M2 chip (all colors: Silver, Space Gray, Starlight, Midnight). Apple Part Number: 821-04129-02 (exact OEM service part). Function: Contains the Hall effect sensor that detects the magnet in the MacBook Air’s display lid. This allows macOS to: Sleep the system when the lid is closed Wake instantly when opened Prevent false sleep/wake events during use Sleep the system when the lid is closed Wake instantly when opened Prevent false sleep/wake events during use Location: Mounted near the right side of the keyboard, adjacent to the battery and logic board. Common Failure Symptoms: MacBook doesn’t sleep when lid is closed MacBook wakes randomly in a bag “Lid closed” not recognized in macOS Requires manual sleep or power button use MacBook doesn’t sleep when lid is closed MacBook wakes randomly in a bag “Lid closed” not recognized in macOS Requires manual sleep or power button use Part Type: Flex cable with integrated Hall sensor—not just a cable, but a calibrated magnetic sensor module. Installation Note: Requires full bottom case removal and careful disconnection of the battery. The sensor is adhered near the I/O area—do not bend or puncture. Recommended for experienced technicians.
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.
Apple USB-C to Lightning Cable (1m) - With Apple Warranty Apple USB-C to Lightning Cable (1m) – With Apple Warranty Connect your iPhone, iPad or iPod with Lightning connector to your USB-C– or Thunderbolt 3 (USB-C)–enabled Mac for syncing and charging, or to your USB-C–enabled iPad for charging. You can also use this cable with your Apple 18W, 20W, 29W, 30W, 61W, 87W or 96W USB‑C Power Adapter to charge your iOS device and even take advantage of the fast-charging feature on selected iPhone and iPad models.
REMAX K10 Ryusic Series Type C One-to-Two Live-Stream Wireless Microphone Lossless Sound Quality: This microphone is equipped with an advanced chip for effective noise reduction, minimizing background noise, and delivering clear, high-fidelity sound. True 2.4GHz Wireless Technology: Operates with a proprietary 2.4GHz transmission protocol that offers stable, real-time audio transmission with ultra-low latency (<20ms), enhancing performance. Long-lasting Battery Life: Powered by an 80mAh polymer battery, the microphone consumes low power and provides up to 6-8 hours of continuous working time. Broad Device Compatibility: Compatible with a variety of devices, including smartphones, tablets, computers, and cameras, offering versatile recording solutions. Portable and Compact Design: Featuring a fingertip-sized form factor, this microphone is designed to be lightweight, compact, and easy to carry, making it ideal for both everyday and professional use. Omnidirectional Pickup: With a 360° omnidirectional microphone pickup, sound is captured evenly from all directions, ensuring comprehensive sound coverage for every recording. Material: ABS Battery Capacity: 80mAh Rated Voltage: 3.7V Charging Time: 1-1.5 hours Charging Port: Type-C Working Time: 6-8 hours Transmission Protocol: 2.4GHz proprietary Latency: Ultra-low latency of <20ms; receiver consumption of <25mA Frequency Response: 20Hz-20kHz Sensitivity: -30dB Signal-to-Noise Ratio: -65dB Transmission Distance: 20 meters Microphone Pickup: 360° omnidirectional
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.
WiWU Hali Vertical Layer Bag — stylish and protective carrying case for laptops and tablets.• Available in 11” & 14” sizes • Water-resistant fabric • Shockproof designMultiple Compartments | Sleek & Lightweight The WiWU Hali Vertical Layer Bag combines modern design with excellent protection for your laptop or tablet. Built from durable, water-resistant materials, it features multiple compartments for organized storage and a slim profile for easy portability. Key Features Available Sizes: 11-inch and 14-inch models High-quality water-resistant fabric for reliable protection Shock-absorbing padding to keep devices safe from bumps and drops Multiple storage layers for accessories such as chargers, cables, and notebooks Soft interior lining to prevent scratches on your device Durable zippers and reinforced stitching for long-lasting use Comfortable top handle and slim vertical design for easy carrying Perfect for travel, school, or office use Specifications Feature Detail Brand WiWU Model Hali Vertical Layer Bag Sizes 11” / 14” Material Water-resistant Oxford fabric Color Options Grey / Black (varies by stock) Design Vertical multi-layer with zip closure Compatibility Fits laptops or tablets up to respective size The WiWU Hali Vertical Layer Bag combines modern design with excellent protection for your laptop or tablet. Built from durable, water-resistant materials, it features multiple compartments for organized storage and a slim profile for easy portability. Available Sizes: 11-inch and 14-inch models High-quality water-resistant fabric for reliable protection Shock-absorbing padding to keep devices safe from bumps and drops Multiple storage layers for accessories such as chargers, cables, and notebooks Soft interior lining to prevent scratches on your device Durable zippers and reinforced stitching for long-lasting use Comfortable top handle and slim vertical design for easy carrying Perfect for travel, school, or office use
WiWU A821CH 8‑in‑1 Stand & Dock – A foldable aluminum laptop stand with a built-in 8‑port USB‑C dock (two USB‑A, two USB‑C, HDMI 4K30, SD/TF, Gigabit Ethernet, PD 100 W).Enhances comfort, cooling, and functionality—perfect for decluttered, professional work setups. Model: WiWU A821CH Design: Sturdy aluminum alloy stand with foldable, portable design, hollow surface for cooling, and silicone pads to prevent slips Dimensions & Weight: Compact when folded (~400 g in aluminum) Docking Hub Ports: 2 × USB-C ports 2 × USB‑A 3.0 ports 1 × HDMI (up to 4K@30 Hz) SD + micro‑SD card slots 1 × RJ‑45 Gigabit Ethernet (1000 Mbps) Docking Hub Ports: 2 × USB-C ports 2 × USB‑A 3.0 ports 1 × HDMI (up to 4K@30 Hz) SD + micro‑SD card slots 1 × RJ‑45 Gigabit Ethernet (1000 Mbps) Power Delivery: USB-C PD 3.0 supports up to 100 W—can charge a laptop while using other ports Connectivity: HDMI supports up to 4K@30 Hz; Ethernet up to Gigabit speed Stand Features: Detachable base—can use stand and hub together or separately, with adjustable ergonomic angles and vents for airflow Durability: Aluminum alloy with frosted texture, scratch-resistant finish, tested to executive standards
Logitech G403 HERO – Ergonomic wired gaming mouse with HERO 25K sensor and ultra-precise 25,600 DPI tracking.Delivers pro-grade performance with customizable RGB, 6 buttons, and optional weight tuning. ✅ Full Specifications: Model: Logitech G403 HERO Sensor: HERO 25K Optical Sensor DPI: 100 – 25,600 DPI (adjustable with no smoothing, acceleration, or filtering) Polling Rate: 1000 Hz (1ms response time) Tracking Speed: >400 IPS Acceleration: >40G Buttons: 6 programmable buttons (including 2 side buttons) Switches: Mechanical with metal spring button tensioning (rated for 20M+ clicks) Lighting: RGB Lighting (logo and scroll wheel, customizable via G HUB) Weight: Approx. 87g (mouse only) + 10g optional weight Grip Style: Palm and claw grip support Cable: 2.1 meters (standard rubber cable) Build: Ergonomic right-handed design with rubber side grips Software: Logitech G HUB (for DPI, lighting, macros, and profiles) Compatibility: Windows 7 or later, macOS 10.11 or later, Chrome OS Onboard Memory: Yes (save DPI and button settings directly to the mouse)
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 Crucial DDR4 32GB laptop memory runs at 3200MHz to deliver faster performance and smoother multitasking. Designed for reliability and compatibility, it’s an ideal upgrade for laptops that need improved speed, responsiveness, and efficiency. The Crucial DDR4 32GB 3200MHz laptop RAM is built for users who want to significantly boost their system’s performance. Whether you’re multitasking, working with heavy applications, or simply looking for a smoother everyday experience, this memory upgrade helps your laptop run faster and more efficiently. 32GB DDR4 Capacity: Provides ample memory for demanding tasks, multitasking, and professional workloads. 3200MHz Speed: Enhances system responsiveness and reduces load times. Laptop Form Factor: Designed specifically for notebooks using DDR4 SODIMM slots. Low Power Consumption: Improves efficiency and helps extend battery life. Wide Compatibility: Tested to work with a wide range of laptop brands and models. Manufactured by Crucial, a trusted Micron brand, this DDR4 memory is built using high-quality components and tested to meet strict reliability standards for long-term performance. With easy installation and a noticeable performance boost, the Crucial DDR4 32GB 3200MHz laptop RAM is a smart and cost-effective upgrade that extends the life and capabilities of your laptop.
A high-performance pre-owned Dell Precision 5540 mobile workstation with 15.6" 4K touchscreen, 9th Gen Core i7, 16GB RAM, 256GB SSD, and NVIDIA Quadro T2000 4GB—engineered for creative professionals, engineers, and designers who demand power and precision.
Genuine-spec touchpad flex cable for MacBook Pro 13″ (Model A2289, 2020, Intel)—restores full Force Touch functionality, haptic feedback, and preci multi-touch gesture control. OEM-quality replacement for damaged or faulty original cables. Compatible With: MacBook Pro 13-inch (2020, Four Thunderbolt Ports, Model A2289, Model Identifier MacBookPro16,2) with Intel Core i5/i7 processors. 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 unusable Fixing: Intermittent or erratic trackpad behavior Loss of Force Touch or haptic feedback Complete trackpad unresponsiveness Replacing a torn, creased, or liquid-damaged original flex cable Completing a trackpad replacement when the original cable is unusable Fixing: Intermittent or erratic trackpad behavior Loss of Force Touch or haptic feedback Complete trackpad unresponsiveness Intermittent or erratic trackpad behavior Loss of Force Touch or haptic feedback Complete trackpad unresponsiveness Installation Note: Requires full bottom case removal and battery disconnection. Cable routes under internal components (speaker, logic board)—must follow original path. Connects via ZIF (Zero Insertion Force) socket—align carefully, never force. Recommended for experienced or certified technicians only. Requires full bottom case removal and battery disconnection. Cable routes under internal components (speaker, logic board)—must follow original path. Connects via ZIF (Zero Insertion Force) socket—align carefully, never force. Recommended for experienced or certified technicians only. Important Compatibility Notes: ✅ Only for A2289 (13″, 4 Thunderbolt ports, 2020, Intel) ❌ Not compatible with: A2251 (2 Thunderbolt ports, 2020) A2338 (M1 MacBook Pro, 2020) Any MacBook Air or 14″/16″ MacBook Pro ✅ Only for A2289 (13″, 4 Thunderbolt ports, 2020, Intel) ❌ Not compatible with: A2251 (2 Thunderbolt ports, 2020) A2338 (M1 MacBook Pro, 2020) Any MacBook Air or 14″/16″ MacBook Pro A2251 (2 Thunderbolt ports, 2020) A2338 (M1 MacBook Pro, 2020) Any MacBook Air or 14″/16″ MacBook Pro
A1618 Replacement Battery for MacBook Pro 15 Inch Retina A1398 (Early 2015), Laptop A1494 A1618 Replacement Battery Capacity: 8440mAh/95.03Wh 11.26V, Battery Type: Li-Polymer 【Package include: 1pcs – OEM laptop replacement battery for macbook air 13 inch, 2pcs – screwdrivers, 1pcs – Professional installation instructions】 【Operating life and certification】UL-/CE-/FCC-/RoHS-Certified/PSE Report for safety. Cobalt Proportion: >98%. Upgrade chip — Up to 1500+ recharge cycles over the life of the battery, Long operating time after charging full with 8440mAh real high capacity, same with original battery A1494/A1618 【Premium Electric Core】Japan Newest 4.0 upgraded OEM Battery for macbook pro 15 Inch A1398 (Late 2013, Mid 2014, Early 2015). Better circuit board, multiple command chip control, keep the battery stable charge and discharge.Over charger and discharger (short-circuit) protection, ensure fast charges and low power consumption 【Compatibility】 MacBook pro 15” Retina A1398 (Late 2013, Mid 2014, Early 2015) ME293 ME294 MGXA2 MGXC2 MJLQ2 MJLT2 MJLU2. Please check the picture to get more detail
A reliable pre-owned Dell Latitude 5480 with 14" display, 7th Gen Core i5, 8GB RAM, and 256GB SSD—offering solid business performance, security, and durability for everyday professional use.
Genuine Apple MagSafe 3 charging cable (2-meter length), originally shipped with MacBook Pro 14"/16" (2021, M1 Pro/Max) and MacBook Pro 16" (2023, M2/M3 Max). Used but fully functional, tested for safe power delivery and data handshake with Apple laptops. Compatibility: MacBook Pro 14″ (2021–2023, M1 Pro/Max, M2 Pro/Max, M3 Pro/Max) MacBook Pro 16″ (2021–2023, M1 Max, M2 Max, M3 Max) Works with Apple 67W, 96W, and 140W USB-C Power Adapters (sold separately) MacBook Pro 14″ (2021–2023, M1 Pro/Max, M2 Pro/Max, M3 Pro/Max) MacBook Pro 16″ (2021–2023, M1 Max, M2 Max, M3 Max) Works with Apple 67W, 96W, and 140W USB-C Power Adapters (sold separately) Connector Type: MagSafe 3 (magnetic, tri-oval tip) on laptop end USB-C on power adapter end MagSafe 3 (magnetic, tri-oval tip) on laptop end USB-C on power adapter end Cable Length: 2 meters (≈6.6 feet) – longer than the standard 1.8m cable, ideal for flexible desk or bedside setups. Condition: Original Apple cable, previously used but fully tested: No fraying, kinks, or exposed wires MagSafe 3 connector intact with strong magnetic hold Charges MacBook at full rated speed (supports up to 140W with compatible adapter) Passes Apple’s authentication handshake (no “Not Supported” warnings) No fraying, kinks, or exposed wires MagSafe 3 connector intact with strong magnetic hold Charges MacBook at full rated speed (supports up to 140W with compatible adapter) Passes Apple’s authentication handshake (no “Not Supported” warnings) What’s Included: MagSafe 3 to USB-C cable only Power adapter NOT included MagSafe 3 to USB-C cable only Power adapter NOT included Why Choose This: Cost-effective alternative to buying new 100% genuine Apple—no third-party risks (overheating, slow charging, compatibility errors) Ideal for backup, travel, or replacing a damaged original cable Cost-effective alternative to buying new 100% genuine Apple—no third-party risks (overheating, slow charging, compatibility errors) Ideal for backup, travel, or replacing a damaged original cable
Wireless freedom with zero compromise. The A4Tech 3330N is a high-performance 2.4GHz wireless combo that combines the GK-3 full-size keyboard with the G3-330N optical mouse. Featuring a 10–15m operating range, 12-month battery life, and 12 multimedia hotkeys, it’s the perfect plug-and-play solution for a clean, cable-free workspace. The A4Tech 3330N Wireless Desktop is engineered for consistent stability and long-term durability. Utilizing advanced Smart Wireless SoC technology, this set minimizes circuit loss and interference, providing a reliable connection that feels as responsive as a wired setup. Key Features: Consistent Wireless Stability: Advanced 2.4GHz powerful wireless connection with a distance of up to 10–15 meters. Auto-channel stabilizing ensures essentially no delays or connection conflicts. Energy Efficient Design: Enjoy up to 12 months of battery life thanks to energy-efficient engineering. The set also features Auto Power Saving with a 4-level sleep mode that activates after just 0.2s of inactivity. Full-Size Multimedia Keyboard: The GK-3 keyboard includes 12 Fn hotkeys for quick access to media controls, along with laser-inscribed keys that never fade and adjustable legs for ergonomic comfort. Precision Optical Mouse: The included G3-330N mouse offers a 1200 DPI resolution for smooth and accurate tracking. Its symmetric design makes it comfortable for both right and left-handed users of all hand sizes. 16-in-One Gestures: The mouse supports 16 different gestures to perform selectable hotkey commands, enhancing your workflow and productivity. Spill-Resistant Durability: The keyboard is designed with built-in drain holes, ensuring that accidental liquid spills won’t end your workday. Specifications at a Glance: Connection: 2.4G Hz Wireless (Nano USB Receiver) Keyboard Model: GK-3 (Full-Size) Mouse Model: G3-330N (1200 DPI Optical) Operating Range: 10 to 15 Meters Hotkeys: 12 Fn Multimedia Hotkeys Battery: 1 AA for Keyboard, 1 AA for Mouse (Up to 12 months) Compatibility: Windows 7 / 8 / 8.1 / 10 / 11
The Apple Magic Mouse (USB-C version) is a sleek, minimalist multi-touch wireless mouse built for Mac users. It offers smooth gesture support, Bluetooth connectivity and a built-in rechargeable battery — a great choice if you prefer a clean desk setup and full compatibility with macOS and iPadOS. General Name: Magic Mouse (USB-C) — part of Apple’s pointing-device lineup. Wireless connectivity: Bluetooth. Rechargeable battery: built-in, no disposable AA cells. Charging / port: USB-C port (bottom of mouse) for pairing and charging. Compatibility: Requires a Mac with macOS 15.1 or later, or an iPad with iPadOS 18.1 or later. Size & Weight Height: ~0.85 inch (2.16 cm) Width: ~2.25 inch (5.71 cm) Depth: ~4.47 inch (11.35 cm) Weight: ~0.22 pound (0.099 kg) (varies slightly by manufacturing) Features Multi-Touch surface: supports gestures such as swiping between pages, scrolling through documents, zooming. Glide / foot design: optimized for smooth movement across desktop surfaces. Rechargeable battery life: about a month or more between charges (typical use) per Apple spec. Used Condition ConsiderationsSince you’re specifying a used unit: Check for wear on the bottom feet / skates — these degrade and affect glide. Verify battery capacity / health (rechargeable batteries age). Confirm the port is functioning (USB-C) and Bluetooth connectivity is stable. Look for signs of excessive surface scratches on the multi-touch top — may impair gestures. Ensure the firmware / Mac recognizes it fully (gestures working). Upgradability / Limitations Not user-upgradable: You cannot replace the internal battery or change internals easily. Design limitation: The USB-C port remains on the bottom of the mouse, meaning you cannot use it while charging unless you flip it. This design is still criticized. Ergonomics: The flat, low-profile design is stylish but may not suit extended-use comfort for some users.
lenovo battery L15L2PB4 L15L2PB5 Laptop Battery for Lenovo IdeaPad 310-15ISK 310-15IKB 310-15ABR 310-15IAP 310 Touch-15IKB/15ISK 510-15ISK 510-15IKB L15C2PB5 L15M2PB5 L15M2PB3 L15C2PB3 L15C2PB7 L15S2TB0 7.6V 30Wh About this item Battery type: Li-ion; Voltage: 7.6V/7.72V; Capacity: 30Wh/39Wh Compatible Models: Fit for Lenovo IdeaPad 510-15IKB/510-15ISK Series; IdeaPad 310 Touch-15IKB/310 Touch-15ISK Series; IdeaPad 310-15ABR/310-15IAP/310-15IKB/310-15ISK Series Replace Part Numbers: L15L2PB4 L15L2PB5 L15C2PB5 L15M2PB5 L15M2PB3 L15C2PB3 L15C2PB7 L15S2TB0 L15S2TBO 5B10K88299 8S5B10K88299 2ICP6/54/90 2ICP6/55/90 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery. The actual operation time will depend on how much electricity the device requires and how you use it.
About this item Noise-cancelling microphone reduces room noise for clearer Internet calls Full stereo sound for your music, movies and games Rotating microphone boom can be worn on your left or right side Adjustable headband gives you a customized fit Works with Windows 10 or later, Windows 8, Windows 7, Windows Vista, Mac OS X 10.5 or later, Chrome OS, Linux Kernel 2.6+ and iOS or Android devices
Used, original 35 W USB-C charger for Mac — reliable Apple power adapter (dual USB-C) for charging your Mac and other devices. This is an authentic Apple 35 W USB-C power adapter (dual-port) — used but tested. It’s built to charge MacBooks, iPhones, iPads, and other USB-C devices. Though lower wattage than larger Mac adapters, it works well for light use or supplemental charging. Features & Behavior Dual USB-C ports: can charge two devices simultaneously Intelligent power distribution: if both ports are used, the output splits evenly (~17.5 W each) USB Power Delivery support across standard profiles (5V, 9V, 15V, 20V) Accepts input 100-240V AC, so usable worldwide (with correct plug) Compact form factor in one variant, or standard “duckhead” plug style in another Specifications Strengths & Limitations Pros Authentic Apple unit — safer and more reliable than generic chargers Dual ports give flexibility — charge phone + Mac concurrently Portable and suitable for travel (universal voltage) Cons 35 W is low for MacBook Pro under load — might not maintain charging during heavy use When both ports used, power is halved (~17.5 W each) Used condition may include wear, scuffs, or reduced efficiency
