--- product_id: 624234337 title: "G Keni Smart Brake Sensing Rear Bike Lights, Auto Light Sensing Bike Tail Light, IPX6 Waterproof, Ultra Bright LED Taillights, Rechargeable Safety Road Back Bicycle Lights for Night Riding" brand: "g keni" price: "€ 42.10" currency: EUR in_stock: true reviews_count: 13 category: "G Keni" url: https://www.desertcart.pt/products/624234337-g-keni-smart-brake-sensing-rear-bike-lights-auto-light store_origin: PT region: Portugal --- # 120 lumens ultra-bright LED output 50-hour USB-C rechargeable battery Smart brake alert for instant safety G Keni Smart Brake Sensing Rear Bike Lights, Auto Light Sensing Bike Tail Light, IPX6 Waterproof, Ultra Bright LED Taillights, Rechargeable Safety Road Back Bicycle Lights for Night Riding **Brand:** g keni **Price:** € 42.10 **Availability:** ✅ In Stock ## Summary > 🚴‍♂️ Light up your ride, brake with confidence! ## Quick Answers - **What is this?** G Keni Smart Brake Sensing Rear Bike Lights, Auto Light Sensing Bike Tail Light, IPX6 Waterproof, Ultra Bright LED Taillights, Rechargeable Safety Road Back Bicycle Lights for Night Riding by g keni - **How much does it cost?** € 42.10 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/624234337-g-keni-smart-brake-sensing-rear-bike-lights-auto-light) ## Best For - g keni enthusiasts ## Why This Product - Trusted g keni brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Long-Lasting Power:** 400mAh rechargeable battery with up to 50 hours runtime and fast USB-C charging keeps you riding longer. - • **Adaptive Light Modes:** Four versatile modes plus auto on/off sensors tailor your light to every ride condition. - • **Rugged & Weatherproof:** IPX6 waterproof aluminum alloy shell built to withstand rain, dust, and rough trails. - • **Brake-Sensing Brilliance:** Automatically boosts brightness for 5 seconds when braking—stay visible, stay safe. - • **Visibility That Commands Attention:** 120 lumens COB LEDs with up to 1000m visibility—own the night ride. ## Overview The G Keni Smart Brake Sensing Rear Bike Light combines cutting-edge brake detection technology with ultra-bright 120-lumen COB LEDs, offering up to 1000 meters of visibility. Featuring four customizable light modes and intelligent auto on/off sensors, it adapts seamlessly to your riding environment. Crafted with a durable IPX6 waterproof aluminum alloy shell and powered by a 400mAh USB-C rechargeable battery delivering up to 50 hours of runtime, this tail light ensures maximum safety and reliability for night and daily cycling. ## Description Product description Upgraded Smart Brake Sensing Bike Tail Light, Cycling Safety Light Sensing Rear Light (Aluminium Alloy Shell) The Upgraded Smart Bike Tail Light Including 4 Modes! Mode 1: Normal Flash Mode (Runing Time: 95hrs) Mode 2: Breathing Flash Mode (Runing Time: 55hrs) Mode 3: Fast Flash Mode (Runing Time: 80hrs) Mode 4: Steady On Mode (Runing Time: 24hrs) NOTICE if you like to ride in the daytime and need the taillight to keep working all the time, please choose mode 3 and mode 4 to avoid Light Sensor working. Please full in charging before the first usage. The metal mounting bracket is a better choice than the rubber mounting bracket （100% stable） Why Choose This Smart Bike Taillight? Brake Sensing Bike Tail Light Automatically switch to High light mode when decelerating, ultra-bright for 5 secs lights warning back rider. (Bike Brake Light) High lumen COB Led lights makes you more visible, visibility up to 150 meters. Brake Sensing works on all the modes. Light Sensing Bike Rear Light Under the weak-light circumstance, this bike tail light will detect and auto ON whenever the bike is in motion. Under the High-light circumstance, this bike tail light will auto OFF. Only works on Normal Flash Mode & Breathing Light Mode Motion Sensing Bike Back Light Auto switches off the bike rear light when no motion is detected within 30 seconds. Auto switches on the rear bike light when detected in motion. Full Aluminum Alloy Shell and Rack The shell and rack made of full aluminum alloy, make this bike rear light more stable installation, Also with a nice touch and awesome appearance. Power Indicator Four blue indicator lights, each shows 25% capacity, No longer worry about forget to charge. IPX6 Waterproof Adopted with waterproof material, the bike rear light it's IPX6. It's waterproof/dustproof and shockproof, suitable for any harsh working environment Adjustable Brightness In the steady on mode, just long press the button to adjust the brightness that you need. Can be charged via USB cable such as computer, power bank and car charger. Features Lamp Beads: COB high light source Battery: Rechargeable, 400 mAh Visible Distance: 150 meters Material of Shell: Aluminum Alloy Material of Rack: Aluminum Alloy+Plastic Weight & Size: 53 g / 40 x 34x34mm Standby Time: 3 Months Charging Time: 3 hours Review: After four years still my favorite tail light! - Great tail light! I am four years n with this light and I’m ordering more only because I love it! Looks great on the bike and works flawlessly! Easy to turn on while riding. Holds a charge very well! Bright! Tucked away under the seat! Super solid mount. Better than any other bike mounted rail light I have used. Not what it needs to be and no more. Perfect design. Cheers! Buy some while you can! Review: Reliable and stylish - Excellent light. Long lasting, stylish and bright. ## Features - SMART BRAKE ALERT: This smart bike tail light automatically switches to ultra bright mode for 5 seconds when braking to help alert riders and vehicles behind you. A reliable brake sensing bike light for road bikes, mountain bikes, and daily commuting - ULTRA BRIGHT VISIBILITY: Featuring high brightness COB LEDs with up to 120 lumens output and visibility up to 1000m, this rear bike light helps improve visibility during night rides and low-light conditions. Ideal for bike lights for night riding and everyday cycling safety - 4 LIGHT MODES & AUTO SENSOR: Choose from Flash, Breathing, Fast Flash, and Steady On modes to match different riding conditions. Built-in motion and light sensors automatically turn the bike rear light off after inactivity and back on when movement is detected - USB-C RECHARGEABLE: Built-in 400mAh rechargeable battery delivers up to 50 hours runtime depending on brightness settings. This usb rechargeable bike light features adjustable brightness, fast USB-C charging, and a 4-level battery indicator display - DURABLE & WATERPROOF: Made with a durable aluminum alloy housing and IPX6 waterproof protection, this waterproof bike light is built for rain, dust, rough roads, and daily use. Perfect for commuter bikes, road cycling, and mountain bike riding ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07W4PGHK7 | | Auto Part Position | Rear | | Best Sellers Rank | #34,099 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #38 in Bike Taillights | | Brand | G Keni | | Brand Name | G Keni | | Color | Black | | Customer Reviews | 4.5 out of 5 stars 2,301 Reviews | | International Protection Rating | IPX6 | | Item Dimensions L x W x H | 1.57"L x 1.34"W x 1.34"H | | Item Weight | 3 Ounces | | Light Output Maximum | 120 Lumens | | Manufacturer | K&K International Co.,LTD | | Manufacturer Part Number | Q5 | | Material | Aluminum, Plastic | | Material Type | Aluminum, Plastic | | Model Number | Q5 | | Mounting Type | Seat Mount | | Number of Pieces | 1 | | Number of settings | 4 | | Power Source | Battery Powered | | UPC | 730964003983 | | Warranty Description | 1 Year | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** G Keni - **Color:** Red - **Item Weight:** 3 Ounces - **Light Output Maximum:** 120 Lumens - **Material:** Aluminum, Plastic - **Mounting Type:** Seat Mount - **Number of settings:** 4 - **Power Source:** Battery Powered - **Product Dimensions:** 1.57"L x 1.34"W x 1.34"H - **Water Resistance Level:** Waterproof ## Images ![G Keni Smart Brake Sensing Rear Bike Lights, Auto Light Sensing Bike Tail Light, IPX6 Waterproof, Ultra Bright LED Taillights, Rechargeable Safety Road Back Bicycle Lights for Night Riding - Image 1](https://m.media-amazon.com/images/I/7106EjtMgML.jpg) ![G Keni Smart Brake Sensing Rear Bike Lights, Auto Light Sensing Bike Tail Light, IPX6 Waterproof, Ultra Bright LED Taillights, Rechargeable Safety Road Back Bicycle Lights for Night Riding - Image 2](https://m.media-amazon.com/images/I/61RXOjOg83L.jpg) ![G Keni Smart Brake Sensing Rear Bike Lights, Auto Light Sensing Bike Tail Light, IPX6 Waterproof, Ultra Bright LED Taillights, Rechargeable Safety Road Back Bicycle Lights for Night Riding - Image 3](https://m.media-amazon.com/images/I/71gnvUgp77L.jpg) ![G Keni Smart Brake Sensing Rear Bike Lights, Auto Light Sensing Bike Tail Light, IPX6 Waterproof, Ultra Bright LED Taillights, Rechargeable Safety Road Back Bicycle Lights for Night Riding - Image 4](https://m.media-amazon.com/images/I/61jInCNoJBL.jpg) ![G Keni Smart Brake Sensing Rear Bike Lights, Auto Light Sensing Bike Tail Light, IPX6 Waterproof, Ultra Bright LED Taillights, Rechargeable Safety Road Back Bicycle Lights for Night Riding - Image 5](https://m.media-amazon.com/images/I/61PQF8Kp59L.jpg) ## Available Options This product comes in different **Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ After four years still my favorite tail light! *by A***G on April 20, 2025* Great tail light! I am four years n with this light and I’m ordering more only because I love it! Looks great on the bike and works flawlessly! Easy to turn on while riding. Holds a charge very well! Bright! Tucked away under the seat! Super solid mount. Better than any other bike mounted rail light I have used. Not what it needs to be and no more. Perfect design. Cheers! Buy some while you can! ### ⭐⭐⭐⭐⭐ Reliable and stylish *by H***A on March 17, 2026* Excellent light. Long lasting, stylish and bright. ### ⭐⭐⭐⭐⭐ Seems Like a Very Good Tail Light *by R***S on June 21, 2021* This is a nice bright light, easily visible from a distance in daylight over a reasonable range of angles from the rear. The mount is very good. It is solid and secure and about as high on the bike as anything can be. It is well constructed, with an aluminum body and aluminum screw-in receptacle on the mount. The button is firm with distinct tactile feedback that you have pressed it. The battery strength indicator lights are very small but visible. There are four modes, only two of which I use. The first two have auto-on and off features that I don't trust and flashing patterns I don't like. The third one has a an eye catching strobe that I normally use to be visible to cars and the fourth one is steady on for when someone is riding behind you and the strobe would be distracting. The brake light feature works pretty well, which is also good for when someone is riding behind you. I like it so much I bought a second one for my daughter's bike. ## Frequently Bought Together - G Keni Smart Bike Tail Light, Brake Sensing Rear Lights, Auto On/Off, Waterproof, USB Rechargeable, Ultra Bright LED Warning Back Bicycle Flashlight, Cycling Safety Accessories - TOWILD CL1200 Bike Lights for Night Riding,Compatible with Garmin/GoPro Mount,1200 Lumen Bright Bike Headlight,4000mAh Rechargeable Battery,Waterproof Bike Front Light for Commuter Cyclists --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/624234337-g-keni-smart-brake-sensing-rear-bike-lights-auto-light](https://www.desertcart.pt/products/624234337-g-keni-smart-brake-sensing-rear-bike-lights-auto-light) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-06-22*