Original 13.3-inch Retina LCD display assembly for MacBook Pro A1502 (pulled from a working unit). OEM part, ready to replace cracked or malfunctioning screens with perfect visual quality. This is a genuine Retina display assembly removed from a fully functional MacBook Pro model A1502. It’s ideal as a replacement for a damaged or broken screen, offering original Apple quality without needing aftermarket components. Key Features & Functionality Factory Retina IPS panel with high color accuracy and brightness Integrated LCD, backlight, front glass, display cable and hinges Tested for proper display, backlight, no dead/stuck pixels (unless noted) Designed to match original tolerances, alignment, and thickness Compatible with MacBook Pro A1502 models (various years) Detailed Specifications Important Notes & Considerations Ensure model is A1502 — other MacBook Pro models have different connectors and frames. Even though tested, minor cosmetic marks or micro-scratches may exist. Handle with extreme care — glass is fragile, flex cables delicate. Professional reinstallation recommended for best alignment and function.
Genuine-spec touchpad flex cable for MacBook Pro 13″ with Touch Bar (Model A1708, 2016–2017)—restores full Force Touch functionality, haptic feedback, and precise multi-touch gesture control during trackpad repair or replacement. Compatible With: MacBook Pro 13″ (2016) – Model A1708 (Model Identifier: MacBookPro13,1) MacBook Pro 13″ (2017) – Model A1708 (Model Identifier: MacBookPro14,1) (Both years share the same internal trackpad assembly and flex cable.) MacBook Pro 13″ (2016) – Model A1708 (Model Identifier: MacBookPro13,1) MacBook Pro 13″ (2017) – Model A1708 (Model Identifier: MacBookPro14,1) (Both years share the same internal trackpad assembly and flex cable.) 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 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.
The Meetion C235 is an economical wired keyboard and mouse combo featuring a full-size 104-key layout and reliable USB connectivity. Designed for business and office use, it offers comfortable typing, smooth mouse control, and plug-and-play compatibility with laptops and desktops. The Meetion C235 Keyboard & Mouse Combo is a practical and cost-effective solution for everyday office and business needs. With a full-size 104-key keyboard, it provides a familiar and comfortable typing experience, making it perfect for work, study, and daily computer use. The included wired mouse ensures precise and smooth control, while the USB plug-and-play setup makes installation quick and effortless on both laptops and desktop PCs. Full-Size 104-Key Keyboard for comfortable and efficient typing Wired USB Connection for stable, lag-free performance Plug & Play – no drivers required Comfortable Key Layout ideal for office and business work Smooth Wired Mouse Included for accurate control Durable Design suitable for long working hours Compatible with Laptop & Desktop PCs Economical Combo Set perfect for home or office setups Ideal for business offices, schools, home setups, and laptop users who need a reliable keyboard and mouse combo for productivity. Works with most computers and laptops supporting USB.
A high-performance pre-owned MacBook Pro 15" (2015) with a stunning Retina display, upgraded 16GB RAM, 128GB SSD, and powerful 2GB dedicated graphics—ideal for developers, creatives, and power users seeking reliable Apple performance.
Mouschi Field Computer Mouse Pad, Non-Slip Rubber Base and Textured Stitched Edge Mousepads, Mouse Pad Pack for Office and Home Mouschi Field Computer Mouse Pad, Non-Slip Rubber Base and Textured Stitched Edge Mousepads, Mouse Pad Pack for Office and Home Brand: Mouschi Size: Small – 290 X 240 X 3mm Medium – 360 X 300 X 3mm Large – 450 X 400 X 4 mm X-Large – 900 X 420 X 4 mm Color: Black Recommended uses for product: Gaming Material: fabric Mouschi Field Mouse Pad Micro-Weave Fabric: Creates a dense surface for a faster and smoother glide for your mouse. Durable Stitched Anti-Fray Edges: 360° of stitching guards against surface peeling. Staying Power: An anti-skid textured rubber base keeps the mouse pad securely in place even during the most intense gaming sessions. Brand: Mouschi Size: Small – 290 X 240 X 3mm Medium – 360 X 300 X 3mm Large – 450 X 400 X 4 mm X-Large – 900 X 420 X 4 mm Color: Black Recommended uses for product: Gaming Material: fabric
Original 13.3-inch LCD display assembly for MacBook Air A1466, pulled from a working unit. OEM, drop-in replacement for cracked or nonfunctional screens—ideal for restoring perfect visuals. This is a genuine Apple LCD display assembly for the MacBook Air model A1466 (mid-2013 to ~2017). It was removed from a working machine (“pulled”) and tested. It’s intended to replace failed, cracked, or damaged screens with an OEM original part. Key Features & Functionality Factory original LCD panel with LED backlight Includes glass, mounting frame, hinges, display cable Calibrated by Apple for color accuracy, brightness, contrast Tested for display quality, backlight uniformity, dead or stuck pixels Fits directly in A1466 models with correct alignment and cable interface Specifications Important Notes & Caveats Must ensure your MacBook is A1466 — wrong model = mismatch in frame, mounting, cable. As a used component, there may be light cosmetic wear or micro-scratches. Always test before full installation (connect the cable, boot, check display and backlight). Be careful handling: glass is fragile and the flex cable is delicate. Alignment and screw placement are critical — incorrect installation can damage the new screen.
OEM-quality left and right loudspeaker replacement pair for MacBook Pro 14″ (Model A2442, 2021, M1 Pro/Max)—restores Apple’s high-fidelity six-speaker audio system with precise sound staging, rich bass, and clear highs. Compatible With: MacBook Pro 14-inch (2021, Model A2442) with Apple M1 Pro or M1 Max chip (Model Identifier: MacBookPro18,3 or MacBookPro18,4). Includes: Complete left and right speaker assemblies, each containing: Dual-driver units (force-cancelling woofers + tweeters) Pre-attached flex cables with OEM connectors Mounting brackets and acoustic seals Dual-driver units (force-cancelling woofers + tweeters) Pre-attached flex cables with OEM connectors Mounting brackets and acoustic seals Audio Performance: Matches Apple’s advanced six-speaker sound system with: Wide stereo separation High dynamic range Spatial audio and Dolby Atmos support (when paired with original logic board and firmware) Wide stereo separation High dynamic range Spatial audio and Dolby Atmos support (when paired with original logic board and firmware) OEM Build Quality: Precision-engineered housings with exact acoustic chambers, grille alignment, and cable routing—ensures zero rattling and full macOS audio calibration compatibility. Common Use Cases: Replaces speakers damaged by liquid ingress, physical impact, or internal failure (e.g., no sound, distorted audio, or imbalance between channels). Installation Note: Requires full bottom case and logic board disassembly. Speakers are secured with screws and acoustic adhesive. Highly recommended for certified Apple technicians or experienced professionals only due to complex internal layout and sensitivity of audio components. Important: This speaker pair is exclusive to A2442 (14″, 2021, M1 Pro/Max). Not compatible with 16″ MacBook Pro (A2485), 13″ models, or Intel-based MacBooks. This speaker pair is exclusive to A2442 (14″, 2021, M1 Pro/Max). Not compatible with 16″ MacBook Pro (A2485), 13″ models, or Intel-based MacBooks. Model Verification: Confirm your device via > About This Mac > Model Identifier (must be MacBookPro18,3 or MacBookPro18,4).
Features: Advanced bluetooth Chip (V5.4): Enjoy seamless and robust connectivity with the latest bluetooth 5.4 technology, providing stable and efficient wireless performance. Superior Sound Quality: Experience immersive HiFi audio with powerful bass and clarity, courtesy of dual 52mm drivers paired with a bass diaphragm designed to deliver exceptional sound. Vibrant RGB Light Display: Half of the speaker surface displays dynamic and colorful RGB lights, creating a visually captivating experience that enhances your music enjoyment. Extended Battery Life: Benefits from extensive playtime powered by a 3000mAh battery, with up to 4 hours of continuous playback and an impressive 180 days of standby time. TWS Pairing: Effortlessly pair two speakers to achieve a rich, enveloping stereo sound that transforms any space into a lively audio environment. Multiple Playback Modes: Versatility at its best with multiple playback options, including FM radio, AUX input, TF card, and USB playback, ensuring you have endless ways to enjoy your favorite tunes.
BATTERY DELL 93FTF Laptop Battery Compatible with Dell Precision15 3520 3530 Dell Latitude12 5280 E5280 Latitude E5280 E5480 E5580 E5490 E5590 E5480 E5290 E5591E5491 Series D4CMT 4YFVG 83XPC 083XPC 11.4V 51Wh About this item Battery Type:3cell Li Polymer Best Quality Voltage &Capacity :11.4V 51Wh 4254MAH Safeguard features against incorrect voltage, short circuit, internal overheating 100% Brand new ,Grade A cells battery; Quality assurance;every battery has passed factory testing; 500+ recharge cycles over
The HyperX Pulsefire Haste 2 Core Wireless is an ultra-lightweight, high-performance gaming mouse designed for speed, precision, and long-lasting comfort. Featuring dual-mode wireless connectivity and an operating weight of just 70 grams, it delivers low-latency competitive gaming powered by a single AAA battery. ✅ Full Specifications: Model: HyperX Pulsefire Haste 2 Core Wireless (White Edition / 8R2E7AA) Interface / Connection: Dual Wireless Connection Modes: High-speed 2.4GHz Wireless (via included USB-A nano receiver) Bluetooth 5.2 (Power-efficient mode for casual use and multi-device pairing) Interface / Connection: Dual Wireless Connection Modes: High-speed 2.4GHz Wireless (via included USB-A nano receiver) Bluetooth 5.2 (Power-efficient mode for casual use and multi-device pairing) Performance & Sensor: Sensor Type: HyperX Custom Core Optical Sensor Max Resolution: Up to 12,000 DPI DPI Presets: 400 / 800 / 1600 / 3200 DPI Tracking Speed: 300 IPS Acceleration: 35G Polling Rate: Up to 1,000Hz (1ms response time) Performance & Sensor: Sensor Type: HyperX Custom Core Optical Sensor Max Resolution: Up to 12,000 DPI DPI Presets: 400 / 800 / 1600 / 3200 DPI Tracking Speed: 300 IPS Acceleration: 35G Polling Rate: Up to 1,000Hz (1ms response time) Switches & Durability: Main Left/Right Switches: Tactile TTC Gold Switches Switch Lifespan: Rated for up to 20 million clicks Total Buttons: 6 programmable buttons (including 2 thumb side buttons) Switches & Durability: Main Left/Right Switches: Tactile TTC Gold Switches Switch Lifespan: Rated for up to 20 million clicks Total Buttons: 6 programmable buttons (including 2 thumb side buttons) Material & Build: Durable solid-upper shell with low-friction PTFE skates for seamless gliding across cloth mouse pads Design & Form Factor: Lightweight, symmetrical ergonomic frame suitable for various grip styles (palm, claw, fingertip) Lighting Effects: Customizable onboard LED RGB lighting Battery & Power: Battery Type: User-replaceable, 1x AAA Alkaline Battery Battery Life: Up to 100 hours (on 2.4GHz mode) or up to 200 hours (on Bluetooth mode) Battery & Power: Battery Type: User-replaceable, 1x AAA Alkaline Battery Battery Life: Up to 100 hours (on 2.4GHz mode) or up to 200 hours (on Bluetooth mode) Security & Software: Fully compatible with HyperX NGENUITY software for button remapping, macro recording, and custom RGB profile management Compatibility: PC, Xbox Series X|S, Xbox One, PlayStation 5 (PS5), PlayStation 4 (PS4), and Mac Dimensions: Approx. 124.3 x 66.8 x 38.2 mm Weight: Mouse Only: Approx. 60 grams Operating Weight (with AAA battery): Approx. 70 grams Weight: Mouse Only: Approx. 60 grams Operating Weight (with AAA battery): Approx. 70 grams
Apple 140W USB-C Power Adapter | MLYU3AM/A
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.
The Stylus Pen is an active capacitive stylus pen designed for smooth and precise writing on all capacitive touchscreens. Featuring a superfine copper nib, palm rejection, and rechargeable battery, it’s perfect for note-taking, drawing, and everyday touchscreen use with iPads, iPhones, tablets, and smartphones. The Superfine Nib Active Capacitive Stylus Pen (Silver) is built for users who want accurate and smooth writing on touchscreens without needing Bluetooth or an app. Its superfine elastic copper tip provides delicate strokes while helping protect your screen from scratches. With palm rejection support, rechargeable battery, and one-click operation, it’s ideal for students, professionals, and creators using iPads, iPhones, and other capacitive touchscreen devices. Superfine Copper Nib for smooth writing and accurate strokes Palm Rejection Technology for comfortable writing experience No Bluetooth / No App Required – one-click operation Rechargeable Battery with up to 10 hours working time Magnetic Cap Design prevents loss and keeps the pen protected Compatible with iOS & All Capacitive Touchscreens Lightweight & Portable ideal for travel, school, and office use Compatible with all capacitive touchscreen devices, including iPad Pro, iPad Mini, iPad Air, and iPhones (11 series and earlier generations), plus most Android tablets and touchscreen phones.
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
WiWU Linker 721HD Hub – Compact USB-C hub with 7 ports including 100W PD, dual USB-A, USB-C data, HDMI 4K60, and dual SD/TF slots.Aluminum body, plug‑and‑play compatibility with MacBooks and modern USB‑C devices—ideal for laptop expansion. Model: Linker 721HD (WiWU) Material: Aluminum-alloy shell Ports: 2 × USB‑A 3.1 1 × USB‑C 3.1 (data) 1 × USB‑C PD power delivery (up to 100 W) 1 × HDMI (4K @ 60 Hz) SD card slot + micro‑SD (TF) slot (USB 3.0 speed) Ports: 2 × USB‑A 3.1 1 × USB‑C 3.1 (data) 1 × USB‑C PD power delivery (up to 100 W) 1 × HDMI (4K @ 60 Hz) SD card slot + micro‑SD (TF) slot (USB 3.0 speed) Cable: Fixed USB‑C male cable (approx. 15 cm) Compatibility: Plug-and-play with USB-C/Thunderbolt 3/4 devices (MacBook, XPS, Chromebooks, mobile devices with DP-Alt Mode) Design: Compact, space gray finish optimized for travel/work setups Weight: ~150 g
The TP-Link TL-WA855RE N300 Universal Range Extender boosts your existing 2.4GHz Wi-Fi signal up to 300Mbps to eliminate dead zones and extend coverage. With a compact wall-plug design, dual external antennas, and one-touch WPS setup, it’s perfect for home and office use. The TP-Link TL-WA855RE N300 Universal Wireless Range Extender is an easy and affordable solution to extend your Wi-Fi coverage into areas where your router signal is weak or unavailable. It works with almost any wireless router to repeat and strengthen your existing network, providing improved connectivity for streaming, browsing, video calls, and everyday online tasks. Featuring two external antennas for better signal strength, an Ethernet port for wired devices, and a smart signal indicator for optimal placement, it ensures stable coverage across your space. N300 Wi-Fi Speed (Up to 300Mbps) on 2.4GHz Universal Compatibility works with most Wi-Fi routers and access points Boosts Coverage & Removes Dead Zones for stronger wireless signal Two External Antennas improve range and stability One-Touch WPS Setup for quick and simple connection Smart Signal Indicator helps you find the best placement Ethernet Port for wired connection to TVs, PCs, or consoles Compact Wall Plug Design ideal for home or office use Ideal for homes, offices, apartments, and small businesses needing better Wi-Fi coverage. Works with laptops, smartphones, smart TVs, tablets, IP cameras, and other Wi-Fi devices.
REMAX RT-E601 1200MAH TIME II SERIES EYE-CARING LED LAMP Function— Use the power key to turn on/ off the lamp. Tap the power key to adjust the brightness of the lamp (brightest-normal-dimmest-off) four steps are easy to use. When folding the design lamp holder and arm can rotate the angle within a range of 180 degrees up-down adjustment. Press and hold “Mode” Set” Up” Donkey enter normal time mode, alarm clock and snooze mode, birthday reminder mode timer mode, and temperature mode. Time changes 12 hours/24 hours mode and adjusting the hours, minutes, year, month,t,h, and day. Temperature can change to Celsius or Fahrenheit. The red light will be on when it starts charging, and the red light will go out when it is fully charged. Material—ABS+PC Rated voltage—DC5V /0.5A lighting Mode—Direct glow Key Type—Touch key Luminous flux—250m Color rendering index—>80 Rated power—4W Battery Capacity—1200mAh Weight—346g Charging port—Micro SIZE—87*87*263mmCharging time—4-4:30hour Working time—3:30hour
lenovo battery 42T4733 42T4235 42T4708 42T4714 Laptop Battery Replacement for Lenovo Ibm Thinkpad Sl410 Sl410k Sl510 T410 T410i T420 T510 T510i T520 E40 E50 E420 E520 Sl410 2842 Sl410 2874 Sl410k(11.1V 5200Mah) About this item Battery Type: Li-ion Voltage: 11.1V Capacity: 5200Mah Compatible Part Number: 42T4235 42T4708 42T4714 42T4733 42T4756 42T4764 42T4798 42T4803 42T4819 42T4848 42T4911 51J0499 57Y4185 57Y4545 ASM 42T4703 42T4752 42T4794 42T4702 Compatible with Battery P/N : LENOVO ThinkPad E40 E50 Edge 0578-47B Edge 14″ 05787UJ d 14″ 05787VJ 14″ 05787WJ Edge 15″ E420 E425 E520 L410 L412 L420 L421 L510 L512 L520 SL410 2842 SL410 2874 SL410k 2842 SL510 SL510 2875 SL510 T410 T410i T420 T510 T510i T520 T520i W510 W520 New from Manufacturer. CE-/FCC-/RoHS-Certified for safety.
MacBook Pro A1708 Battery A1713 for MacBook Pro 13 Inch A1708 Late 2016 Mid 2017 (EMC 2978 3164), A2171 Laptop Replacement Battery for MacBook Pro 13 Inch A2159 (2019) A2289 (2020) A2338 (2020) 【Macbook pro 13 Inch battery A1713 & A2171 Battery Specification】– Voltage: 11.4V. Capacity: 54.5Wh / 4781mAh, Battery Type: Li-ion 【Newest 4.0 upgraded OEM Battery for Apple macbook pro】– Japan High Performance Electric Core. Cobalt Proportion: >98%. Upgrade chip. Up to 1500+ recharge cycles over the life of the battery. Overcharger and Discharger Circuit Protection, Ensure fast charges and low power consumption, UL-/CE-/FCC-/RoHS-Certified for safety 【Replacement Battery A1713 for A1708 Macbook pro 13 inch】– A1708 Macbook pro 13” Late 2016: MacBook Pro 13-Inch “Core i5” 2.0 & MacBook Pro 13-Inch “Core i7” 2.4 (MacBookPro13,1, EMC2978, MLL42xx/A, MLUQ2xx/A). — A1708 Macbook pro 13” Mid 2017: MacBook Pro 13-Inch “Core i5” 2.3 & MacBook Pro 13-Inch “Core i7” 2.5 (MacBookPro14,1, EMC3164, MPXQ2xx/A, MPXR2xx/A, MPXT2xx/A, MPXU2xx/A) 【Replacement Battery A2171 for A2159 & A2289 & A2338 Macbook pro 13 inch】– A2159 Macbook pro 13” 2019: MacBook Pro 13-Inch “Core i5” 1.4 Touch & “Core i7” 1.7 Touch (MacBookPro15,4, EMC3301, MUHN2xx/A, MUHP2xx/A, MUHQ2xx/A, MUHR2xx/A, MUHR2xx/B). — A2289 Year 2020: MacBook Pro 13-Inch “Core i5” 1.4 & “Core i7” 1.7 (MacBookPro16,3, EMC 3456, MXK32xx/A, MXK52xx/A, MXK62xx/A, MXK72xx/A). — A2338 Year 2020: MacBook Pro 13-Inch “M1” 8-Core 3.2 (MacBookPro17,1, EMC3578, MYDA2LL/A*)
Experience fluid motion and edge-to-edge clarity with this ultra-smooth 100Hz Full HD display. Featuring a frameless IPS panel and a modern minimalist design, it’s the perfect upgrade for smooth office workflows and casual gaming. Model: Buerotika B24M1 Primary Specs: 23.8-inch (24″ class) Display/Performance: IPS (In-Plane Switching) for superior color accuracy Visual/Build Quality: 1920 x 1080 (Full HD) Resolution Aesthetic: Frameless “Zero-Bezel” design for immersive viewing and seamless multi-monitor setups Build: Ultra-slim profile with a sturdy, modern base Adjustability: Tilt-adjustable stand for ergonomic positioning Input/Output: HDMI and VGA ports for universal compatibility with PCs and laptops Compatibility: Plug-and-play support for Windows and macOS Smooth Motion: 100Hz Refresh Rate (provides significantly smoother scrolling and video compared to standard 60Hz) Eye Care: Low Blue Light technology and Flicker-Free backlight to reduce eye fatigue during long sessions Response Time: 14ms (typical) – optimized for stable, everyday professional use Home & Office: Enhancing productivity with smooth window transitions. Content Consumption: Watching movies and streaming with vibrant IPS colors. Multi-Monitor Arrays: The frameless edges make it ideal for side-by-side configurations. Casual Gaming: A budget-friendly entry into high-refresh-rate smoothness.
