--- product_id: 430192409 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: "VT9574" currency: VUV in_stock: true reviews_count: 8 category: "Rockbros" url: https://www.desertcart.vu/products/430192409-bike-tail-light-smart-brake-sensing-bicycle-rear-lights-ultra store_origin: VU region: Vanuatu --- # 400 lumens ultra-bright LED 50 hours 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:** VT9574 **Availability:** βœ… In Stock ## Summary > πŸš΄β€β™‚οΈ 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?** VT9574 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/430192409-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 - β€’ **4 Dynamic Light Modes:** Customize your ride with Normal, Breathing, Fast Flash, or Steady On modes for any time or terrain. - β€’ **Rugged & Weatherproof:** Premium aluminum build with IPX6 rating means this tail light thrives rain or shine, season after season. - β€’ **Type-C USB Rechargeable:** Fast, universal charging with clear battery indicators so you never run out mid-ride. - β€’ **Auto On/Off Motion Sensor:** Energy-efficient tech powers the light only when you’re moving, extending battery life effortlessly. - β€’ **Brake-Sensing Safety Alert:** Smart sensor triggers a 5-second high-intensity brake flash to keep you visible and protected in traffic. ## Overview The ROCKBROS Bike Tail Light Smart combines ultra-bright 400 lumen COB LEDs with intelligent brake-sensing technology to enhance cycling safety. Featuring 4 customizable light modes and an auto on/off motion sensor, it maximizes battery efficiency with up to 50 hours of runtime on a single Type-C USB charge. Crafted from durable aluminum and rated IPX6 waterproof, this sleek rear light is built to withstand all weather conditions, making it an essential accessory for professional and casual cyclists alike. ## Description Product description In stable startup mode, simply press and hold the button to adjust the desired brightness. There are three levels of brightness to choose from: low, medium, and high. ROCKBROS Q5 smart tail light ROCKBROS Bike Tail Light Smart Brake Sensing AUTO ON/OFF for SAVING BATTERY ALUMINUM ALLOY SHELL & IPX6 WATERPROOF Suit for Normal Flash Mode Breathing Flash Mode auto off when detect in no motion after 30 secs Once shake it or detect the bike is moving, the bike back light will auto on again NOTE: IF YOU LIKE TO RIDE IN THE DAYTIME AND NEED THE TAILLIGHT KEEP WORKING ALL THE TIME, please choose the mode 3 and mode 4 to avoid Light Sensor working. (Brake sensing is always ON in all of the modes.). Upgrade Type C Built-in charging port design, as long as the lights and brackets are tightened, you can ride freely without fear of wind and rain Aluminum Alloy Shell This bicycle brake light shell is made of high grade aluminum, has a nice small profile and awesome metallic appearance. Power Indicator Four blue breathe indicator lights, shows the remaining charge, each shows 25% capacity batterty , remind you to charge in time. IPX6 Waterproof It is IP65 Waterproof to withstand all types of weather conditions. What is included inside the package? 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. What is included inside the package? 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. Where is the USB port on the light unit? Is it accessible without removing the tail light from the saddle? The USB port is located between the light and the rack. You need to remove the tail light from the rack to charge it. Where is the USB port on the light unit? Is it accessible without removing the tail light from the saddle? The USB port is located between the light and the rack. You need to remove the tail light from the rack to charge it. Does the brake feature activate under light braking, or only during moderate and heavy braking? It is quite sensitive. The brake light will activate with any braking. Does the brake feature activate under light braking, or only during moderate and heavy braking? It is quite sensitive. The brake light will activate with any braking. How quickly does it brighten when braking? Can it be set to stay off and only come on when braking? 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. How quickly does it brighten when braking? Can it be set to stay off and only come on when braking? 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. Does it have a low or dead battery indicator on the handlebars? 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. Does it have a low or dead battery indicator on the handlebars? 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. Review: Very Nice Light - This is a great light. The construction is very solid, it's nice and bright, has several different flash modes, and turns off when it's not needed so the battery lasts a decent amount of time for its size. I'm using the under seat mount on a road bike and you barely notice that it's there, which means it doesn't get stolen. My only (minor) gripe is that the motion sensor is a little too sensitive. I chain my bike to a tree sometimes, and a light breeze is enough to turn it on sometimes. Review: A Great Value for a Taillight - 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. ## 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 | #11,003 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #7 in Bike Taillights | | Brand | ROCKBROS | | Brand Name | ROCKBROS | | Color | black | | Customer Reviews | 4.7 out of 5 stars 699 Reviews | | Included Components | mount | | International Protection Rating | IP65 | | Item Dimensions L x W x H | 1.57"L x 1.34"W x 1.34"H | | Item Weight | 53 Grams | | Manufacturer | ROCKBROS | | Manufacturer Part Number | TL907Q50-CBR | | Material | Aluminum | | Material Type | Aluminum | | Model Number | TL907Q50-CBR | | Mounting Type | Seat Mount | | Number of settings | 1 | | Power Source | Battery Powered | | Unit Count | 1.0 Count | | Warranty Description | 1 Year Manufacturer | | Water Resistance Level | Waterproof | ## Product Details - **Auto Part Position:** Rear - **Brand:** ROCKBROS - **Color:** black - **Item Weight:** 53 Grams - **Material:** Aluminum - **Mounting Type:** Seat Mount - **Number of settings:** 1 - **Power Source:** Battery Powered - **Product Dimensions:** 1.57"L x 1.34"W x 1.34"H - **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) ## Available Options This product comes in different **Size, Style** options. ## 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 ### ⭐⭐⭐⭐⭐ Very Nice Light *by J***C on February 9, 2026* This is a great light. The construction is very solid, it's nice and bright, has several different flash modes, and turns off when it's not needed so the battery lasts a decent amount of time for its size. I'm using the under seat mount on a road bike and you barely notice that it's there, which means it doesn't get stolen. My only (minor) gripe is that the motion sensor is a little too sensitive. I chain my bike to a tree sometimes, and a light breeze is enough to turn it on sometimes. ### ⭐⭐⭐⭐⭐ A Great Value for a Taillight *by M***. on October 12, 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. ### ⭐⭐⭐⭐⭐ Epic Purchase *by M***N on October 20, 2025* I'm somewhere between dumb and liking to take risks so I rode for awhile without a front or rear. In an attempt to cherish my life I finally replaced my stolen one. This light is fantastic. The behavior is super easy to figure out, the c-type makes it hella convenient to charge, same aluminum design as the larger one but just cuter. Smaller battery but who cares? It auto shuts off no problem and if you're like me and remove it during the day a long press will keep it from accidently turning on. Can't be beat. Plus I adjusted the mounting today and it fits just snug as a bug. They should make this exact light for the front. SAME EXACT THING. Just in white, yeah this is awesome and I don't regret buying it. Comes with a second mount too that just wraps around, glad its included but it makes it easy to steal. Would def buy again though (assuming this one doesn't vanish!) Woohoo life! I didn't say anything about brightness AI, stay outta of it lol. It's pretty bright, it's behind me though so lolol ## 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? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.vu/products/430192409-bike-tail-light-smart-brake-sensing-bicycle-rear-lights-ultra](https://www.desertcart.vu/products/430192409-bike-tail-light-smart-brake-sensing-bicycle-rear-lights-ultra) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-05-17*