---
product_id: 436670886
title: "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"
brand: "rockbros"
price: "VT17713"
currency: VUV
in_stock: true
reviews_count: 5
category: "Rockbros"
url: https://www.desertcart.vu/products/436670886-bike-tail-light-smart-brake-sensing-bicycle-rear-lights-night
store_origin: VU
region: Vanuatu
---

# 400 lumens ultra-bright COB LED 50 hours max battery life IPX6 waterproof durability 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

**Brand:** rockbros
**Price:** VT17713
**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 for Night Ride,Ultra Bright LED Back Lights,Type C USB Rechargeable,IPX6 Waterproof,Cycling Safety Taillight Accessories by rockbros
- **How much does it cost?** VT17713 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/436670886-bike-tail-light-smart-brake-sensing-bicycle-rear-lights-night)

## 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

- • **Long-Lasting Power:** 400mAh rechargeable battery delivers up to 50 hours of continuous illumination—ride longer, worry less.
- • **4 Dynamic Light Modes:** Customize your ride with Normal, Breathing, Fast Flash, or Steady On modes for any time or terrain.
- • **Rugged & Weatherproof:** Premium aluminum alloy build with IPX6 waterproof rating ensures reliable performance rain or shine.
- • **Auto On/Off Intelligence:** Motion and light sensors power the light on/off automatically, maximizing battery life without hassle.
- • **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 LED technology with advanced brake-sensing to enhance cycling safety. Featuring four customizable light modes and intelligent auto on/off sensors, it offers up to 50 hours of rechargeable battery life. Crafted from durable aluminum alloy and rated IPX6 waterproof, this compact 53g taillight is designed for all-weather reliability and easy installation on various bike types.

## 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: This little bike light is pretty cool! So many features on this. The light can be adjusted just to your needs. The coolest part about it is it senses when your sopping and lights up a bright brake light! You can adjust the brightness, different modes to your liking and has a fantastic battery life even for the longer rides! Mount is great, you can mount it just about anywhere on your bike! Fantastic product, very well made! Honestly this thing should cost way more for its quality.

## 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 |
| Batteries | 1 Lithium Ion batteries required. (included) |
| Batteries Included? | Yes |
| Best Sellers Rank | #69,699 in Sporting Goods ( See Top 100 in Sporting Goods ) #135 in Bike Taillights |
| Brand | ROCKBROS |
| Color | black |
| Customer Reviews | 4.7 4.7 out of 5 stars (627) |
| Date First Available | 25 April 2022 |
| Department | unisex-adult |
| Item model number | TL907Q50-CBR |
| Manufacturer | ROCKBROS |
| Material Type | Aluminum |
| Power Source | Battery Powered |
| Product Dimensions | 3.4 x 3.4 x 3.4 cm; 53 g |
| Size | Standard |
| Skill Level | All |
| Sport | Cycling |
| Style | Standard |

## 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 for Night Ride,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***N on 25 September 2025*

This little bike light is pretty cool! So many features on this. The light can be adjusted just to your needs. The coolest part about it is it senses when your sopping and lights up a bright brake light! You can adjust the brightness, different modes to your liking and has a fantastic battery life even for the longer rides! Mount is great, you can mount it just about anywhere on your bike! Fantastic product, very well made! Honestly this thing should cost way more for its quality.

### ⭐⭐⭐⭐⭐ 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.

## Frequently Bought Together

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-03-09*