--- product_id: 164528382 title: "Circle Smart Bike Brake Tail Light" brand: "g keni" price: "€ 41.71" currency: EUR in_stock: true category: "G Keni" url: https://www.desertcart.pt/products/164528382-circle-smart-bike-brake-tail-light store_origin: PT region: Portugal --- # 120 lumens ultra bright visibility 50 hours USB-C rechargeable runtime Smart brake alert for instant safety Circle Smart Bike Brake Tail Light **Brand:** g keni **Price:** € 41.71 **Availability:** ✅ In Stock ## Summary > 🚴‍♂️ Light up your ride, brake with confidence, and never blend into the night! ## Quick Answers - **What is this?** Circle Smart Bike Brake Tail Light by g keni - **How much does it cost?** € 41.71 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/164528382-circle-smart-bike-brake-tail-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 - • **Brake Smarter, Ride Safer:** Automatically switches to ultra bright mode for 5 seconds when braking, ensuring you're seen and stopping accidents before they happen. - • **Power Up with USB-C Speed:** Fast charging and a 400mAh battery deliver up to 50 hours of runtime, so your light keeps pace with your longest rides. - • **Illuminate Your Night Ride:** 120 lumens COB LEDs with visibility up to 1000 meters keep you confidently visible in any low-light condition. - • **Built to Brave the Elements:** IPX6 waterproof aluminum alloy housing means your light withstands rain, dust, and rough terrain without missing a beat. - • **Tailored Light Modes for Every Ride:** Choose from Flash, Breathing, Fast Flash, and Steady On modes to match your style and environment effortlessly. ## 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 50 hours of USB-C rechargeable power. Its IPX6 waterproof aluminum design ensures durability for all weather conditions, while four versatile light modes and automatic sensors optimize visibility and battery life for professional and daily cyclists alike. ## Description desertcart.com : G Keni Smart Brake Sensing Bike Tail Light, Ultra Bright Rear Bike Light, USB C Rechargeable Waterproof Bike Lights for Night Riding with Auto Sensor for Road & Mountain Bikes : Sports & Outdoors ## 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 | #41,365 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #53 in Bike Taillights | | Brand Name | G Keni | | Color | Black | | Customer Reviews | 4.5 4.5 out of 5 stars (2,324) | | 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 Type | Aluminum, Plastic | | Model Number | Q5 | | Mounting Type | Seat Mount | | Number of Items | 1 | | 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:** Black - **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 ![Circle Smart Bike Brake Tail Light - Image 1](https://m.media-amazon.com/images/I/7106EjtMgML.jpg) ## Available Options This product comes in different **Style** options. ## 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 - Lamicall Bike Phone Holder, Motorcycle Phone Mount - Motorcycle Handlebar Cell Phone Clamp, Scooter Phone Clip for iPhone 15 Pro Max/Plus, 14 Pro Max, S9, S10 and More 4.7" to 6.8" Smartphones - Ascher Ultra Bright USB Rechargeable Bike Light Set, Powerful Bicycle Front Headlight and Back Taillight, 4 Light Modes, Easy to Install for Men Women Kids Road Mountain Cycling Black --- ## 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/164528382-circle-smart-bike-brake-tail-light](https://www.desertcart.pt/products/164528382-circle-smart-bike-brake-tail-light) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-10-08*