--- product_id: 436670886 title: "Bike Tail Light Smart,Brake Sensing Bicycle Rear Lights,Ultra Bright LED Back Lights,Type C USB Rechargeable,IPX6 Waterproof,Cycling Safety Taillight Accessories" brand: "rockbros" price: "KD 17.37" currency: KWD in_stock: true reviews_count: 5 category: "Rockbros" url: https://www.desertcart.com.kw/products/436670886-bike-tail-light-smart-brake-sensing-bicycle-rear-lights-ultra store_origin: KW region: Kuwait --- # 100 lumens ultra-bright LED 50 hours max battery life IPX6 waterproof durability Bike Tail Light Smart,Brake Sensing Bicycle Rear Lights,Ultra Bright LED Back Lights,Type C USB Rechargeable,IPX6 Waterproof,Cycling Safety Taillight Accessories **Brand:** rockbros **Price:** KD 17.37 **Availability:** ✅ In Stock ## Summary > 🚴‍♂️ Light up your ride, own the night! ## Quick Answers - **What is this?** Bike Tail Light Smart,Brake Sensing Bicycle Rear Lights,Ultra Bright LED Back Lights,Type C USB Rechargeable,IPX6 Waterproof,Cycling Safety Taillight Accessories by rockbros - **How much does it cost?** KD 17.37 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/436670886-bike-tail-light-smart-brake-sensing-bicycle-rear-lights-ultra) ## Best For - rockbros enthusiasts ## Why This Product - Trusted rockbros brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **4 Dynamic Light Modes:** Customize your visibility with Normal, Breathing, Fast Flash, or Steady On for any ride vibe. - • **Rugged Aluminum Build:** Sleek, lightweight, and IPX6 waterproof—ready to withstand all weather and terrains. - • **USB Type-C Rechargeable:** Fast 3-4 hour charging with intuitive 4-level battery indicator—never get caught powerless. - • **Auto On/Off Motion Sensor:** Smart power-saving tech activates light on movement, conserving battery without hassle. - • **Brake-Sensing Smart Alert:** Instant 5-second high-intensity flash when slowing down—ride safer, be seen first. ## Overview The ROCKBROS Bike Tail Light Smart combines a powerful 100-lumen COB LED with advanced brake-sensing technology to enhance cycling safety. Featuring four versatile light modes and an intelligent auto on/off motion sensor, it offers up to 50 hours of rechargeable battery life via USB Type-C. Crafted from durable aluminum alloy and rated IPX6 waterproof, this compact rear light ensures reliable visibility and rugged performance for every ride, day or night. ## Description Product Information: Lamp Beads: COB LED Battery: USB Rechargeable, 3.7V/400 mAh Visible Distance: 150 meters Material of Shell: Aluminum Alloy Material of Rack: Aluminum Alloy+Plastic Weight : 53 g Size：40 x 34x34mm Charging Time: 3-4 hours Four Modes: Mode 1: Normal Flash Mode 50hours Mode 2: Breathing Flash Mode 40hours Mode 3: Fast Flash Mode 40hours Mode 4: Steady On Mode 20hours Suit for seat rail spacing：47-55mm Review: I purchased this taillight to augment the anemic flasher on my Garmin Varia Radar. The RockBros light is a great value and an excellent rear light. A full charge seems to last forever and the brake light function is appreciated by riding partners. The light is very bright and easily visible even on a sunny day. The light came with two mounts, a strap for the seat post or a clamp on mount for the seat rails. The light screws into either of them just like a bottle cap. The charging port is accessed when you unscrew the light from the mount. The strap mount works fine, but as a rule I just don't trust straps. I used the clamp mount, which installed easily and holds the light in place on the rails. The clamp was a slight bit loose on my rails, but a small bit of tape under the clamp fixed the issue. I've used the light for about 1500 miles on gravel and trails with no issues. Taillights are a simple bit of kit, but I really appreciate the added visibility, both day and night. Hard to beat the value and function with this light. Review: UPDATE: Rockbros refunded my purchase price, and I will re-buy when they make a unit that has auto on/off and motion sensing in the daylight. Outside of that, it is a very nice unit. Small and bright, with a good mounting system. The brake light algorithm seems to work well. UPDATE: The Q5 is a Tail light. The one I have, does not have auto on/off, motion sensing in the daylight - despite what RockBros.says. In fact, if you very carefully read the PR info, it says this. The tail light has manual mode, strobe flash and contiguous in the daylight, not auto on/off motion sensing. The RockBros Q5 tail light Has several problems. There is no way to shut off the ambient light sensor for the blink and breath functions. This makes it useless in the daylight and only useful at night. So the kid riding to and from school does not have a tail light, which is why I bought a vibration sensing/auto shutoff light in the first place. The manual says that mode 3 and 4 (strobe blink and continuous) are useful in the daylight, but they do not have vibration sensing or auto shutoff. So to get into that mode you have to push the button through all the other modes, and same to shut it off - not very "smart". So, I took the unit apart (thus voiding the warranty) to see if I could cover up the ambient light sensor. That didn't work because they use the off cycle of all the LEDs to sense ambient light. So, I had to block all the LEDs to keep it blinking in the daylight. I asked this question before I bought it, and got an inexact answer back from someone who is not a native English speaker. ## Features - High-Intensity LED & Brake Sensing Advancement:Illuminate your surroundings with our rear bike light's high lumen COB LED. featuring smart sensor technology that activates a brake light when you slow down. The light emits a high-intensity flash for 5 seconds, alerting riders behind you for enhanced safety - Dynamic Modes & Easy Install: Choose from 4 dynamic light modes: (1) Normal Flash, (2) Breathing Flash, (3) Fast Flash, (4) Steady On. Tailored for diverse riding conditions day and night. Effortlessly install with metal under-seat or rubber band seat post mounts. Fits road, mountain, cruiser, scooter - Smart Auto On/Off & Battery Efficiency:- Experience intelligent functionality with our bike rear light. Equipped with Motion and Light Sensors, it automatically turns off after 30 seconds of inactivity. Once movement is detected or your bike is in motion, the light reignites (auto on/off applies to modes 1 and 2). For continuous daytime visibility, opt for modes 3 or 4 to bypass the Light Sensor (Brake sensing active in all modes) - Extended Battery Life & Intuitive Power Display:Stay powered during your rides with the 400mAh Li-ion battery. On a full charge, enjoy up to 50 hours of usage. The built-in power indicator features four blue breathing lights, each indicating 25% battery capacity, ensuring you know when to recharge - Durable Build & All-Weather Ready : Crafted from premium aluminum alloy, our bicycle brake light boasts an elegant metallic finish. Designed to withstand diverse weather conditions with an IPX6 Waterproof rating, making it suitable for any ride ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09VYY4V88 | | Auto Part Position | Rear | | Best Sellers Rank | #14,009 in Sporting Goods ( See Top 100 in Sporting Goods ) #41 in Bike Taillights | | Brand Name | ROCKBROS | | Color | black | | Customer Reviews | 4.6 4.6 out of 5 stars (658) | | Included Components | mount | | International Protection Rating | IP65 | | Item Dimensions L x W x H | 40L x 34W x 34H millimeters | | Item Weight | 53 Grams | | Light Output Maximum | 100 Lumens | | Manufacturer | ROCKBROS | | Manufacturer Part Number | TL907Q50-CBR | | Material Type | Aluminum | | Model Number | TL907Q50-CBR | | Mounting Type | Seat Mount | | Number of settings | 4 | | Power Source | Battery Powered | | Unit Count | 1 Count | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** ROCKBROS - **Colour:** black - **Material:** Aluminum - **Power source:** Battery Powered - **Water resistance level:** Waterproof ## Images ![Bike Tail Light Smart,Brake Sensing Bicycle Rear Lights,Ultra Bright LED Back Lights,Type C USB Rechargeable,IPX6 Waterproof,Cycling Safety Taillight Accessories - Image 1](https://m.media-amazon.com/images/I/61zm72dq2cL.jpg) ## Questions & Answers **Q: What is included inside the package?** A: Ours came in a box containing two mounting brackets (one for under the seat and one for the seat post), a Type-C USB charging cable, an English manual, and the bike taillight itself. **Q: Where is the USB port on the light unit? Is it accessible without removing the tail light from the saddle?** A: The USB port is located between the light and the rack. You need to remove the tail light from the rack to charge it. **Q: Does the brake feature activate under light braking, or only during moderate and heavy braking?** A: It is quite sensitive. The brake light will activate with any braking. **Q: How quickly does it brighten when braking? Can it be set to stay off and only come on when braking?** A: It brightens immediately upon sensing the bike slowing down. There are 4 modes, and the light must be turned on for the brake light function to work. **Q: Does it have a low or dead battery indicator on the handlebars?** A: No. There are four small blinking blue dots in the center of the light unit. When all four blink, it indicates a 100% charge; three dots mean 75%, and so on. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by M***. on 12 October 2024* I purchased this taillight to augment the anemic flasher on my Garmin Varia Radar. The RockBros light is a great value and an excellent rear light. A full charge seems to last forever and the brake light function is appreciated by riding partners. The light is very bright and easily visible even on a sunny day. The light came with two mounts, a strap for the seat post or a clamp on mount for the seat rails. The light screws into either of them just like a bottle cap. The charging port is accessed when you unscrew the light from the mount. The strap mount works fine, but as a rule I just don't trust straps. I used the clamp mount, which installed easily and holds the light in place on the rails. The clamp was a slight bit loose on my rails, but a small bit of tape under the clamp fixed the issue. I've used the light for about 1500 miles on gravel and trails with no issues. Taillights are a simple bit of kit, but I really appreciate the added visibility, both day and night. Hard to beat the value and function with this light. ### ⭐⭐⭐⭐⭐ Review *by J***I on 10 April 2023* UPDATE: Rockbros refunded my purchase price, and I will re-buy when they make a unit that has auto on/off and motion sensing in the daylight. Outside of that, it is a very nice unit. Small and bright, with a good mounting system. The brake light algorithm seems to work well. UPDATE: The Q5 is a Tail light. The one I have, does not have auto on/off, motion sensing in the daylight - despite what RockBros.says. In fact, if you very carefully read the PR info, it says this. The tail light has manual mode, strobe flash and contiguous in the daylight, not auto on/off motion sensing. The RockBros Q5 tail light Has several problems. There is no way to shut off the ambient light sensor for the blink and breath functions. This makes it useless in the daylight and only useful at night. So the kid riding to and from school does not have a tail light, which is why I bought a vibration sensing/auto shutoff light in the first place. The manual says that mode 3 and 4 (strobe blink and continuous) are useful in the daylight, but they do not have vibration sensing or auto shutoff. So to get into that mode you have to push the button through all the other modes, and same to shut it off - not very "smart". So, I took the unit apart (thus voiding the warranty) to see if I could cover up the ambient light sensor. That didn't work because they use the off cycle of all the LEDs to sense ambient light. So, I had to block all the LEDs to keep it blinking in the daylight. I asked this question before I bought it, and got an inexact answer back from someone who is not a native English speaker. ### ⭐⭐⭐⭐⭐ Review *by J***A on 10 October 2025* Excellent tail light! Super bright, automatically senses braking, and adds great visibility at night. Easy to mount, long battery life, and very reliable for safe rides. ## Frequently Bought Together - ROCKBROS Bike Tail Light Smart,Brake Sensing Bicycle Rear Lights for Night Ride,Ultra Bright LED Back Lights,Type C USB Rechargeable,IPX6 Waterproof,Cycling Safety Taillight Accessories - ROCKBROS Super Bright 1000 Lumen Bike Headlight, 5 Mode LED, USB Rechargeable, Aluminium Alloy, IPX6 Waterproof, Front Bike Light with Power&Smart Mode Display - ROCKBROS Bike Bell Classic Bicycle Bell Mountain Bike Bells for Adults with Loud Sound and Fit for 0.87-1.25in/22.2-31.8mm Bicycle Handlebars --- ## 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.com.kw/products/436670886-bike-tail-light-smart-brake-sensing-bicycle-rear-lights-ultra](https://www.desertcart.com.kw/products/436670886-bike-tail-light-smart-brake-sensing-bicycle-rear-lights-ultra) --- *Product available on Desertcart Kuwait* *Store origin: KW* *Last updated: 2026-05-20*