Q2S Smart Bike Tail Light Brake Sensing Bicycle Rear Lights

ROCKBROS Q2 Smart Bike Tail Light Brake Sensing Bicycle Rear Lights

The ROCKBROS Q2 Smart Bike Tail Light offers advanced brake sensing technology to enhance rider safety by instantly signaling deceleration. Its rechargeable battery ensures long-lasting performance, while the waterproof design guarantees reliable use in all weather conditions. Compact and easy to mount, this rear light provides bright, clear visibility to alert drivers and cyclists behind you, making it an essential accessory for serious cyclists focused on safety and performance.

Features

• Smart Brake Sensing & Auto On/Off
  This ROCKBROS smart bike tail light features advanced brake sensing technology. When braking, the high-brightness red LED automatically highlights to alert vehicles and pedestrians behind you—greatly improving nighttime riding safety. Built-in motion and light sensors provide intelligent auto on/off functionality in flash modes 1 and 2: it turns off after 30 seconds of no movement and lights back up once the bike is in motion. For continuous lighting, use modes 3 or 4 to disable the light sensor.
• 4 Lighting Modes for All Conditions
  Choose from 4 lighting modes tailored for day or night rides:
  Slow Flash Mode – Day: steady red with 3s brake light / Night: flash + brake + auto on/off
  Breathing Mode – Day: breathing red with 3s brake light / Night: flash + brake + auto on/off
  Fast Flash Mode – Flash + brake light all the time
  Steady On Mode – Constant light + brake light for maximum visibility
  The bright COB LED ensures you remain visible even in low-light conditions.
• USB Rechargeable & Long Battery Life
  Equipped with a built-in 260mAh lithium battery, this USB-C rechargeable bike rear light charges fully in about 2 hours and delivers 7 to 16 hours of runtime depending on the mode. A subtle light indicator shows charging status and alerts you when power is low.
• IPX6 Waterproof & Lightweight Design
  Rated IPX6, this rear light is fully waterproof and safe to use even in heavy rain. Constructed with high-quality ABS and PC material, it's impact-resistant and only 23g in weight, perfect for daily commuting or long-distance cycling.
• 2 Easy Mounting Options
  The light includes both saddle rail and seatpost mounting brackets to suit different bike types and rider preferences. Install or remove it quickly without any tools. Great for road bikes, mountain bikes, and urban commuting bikes.

Product Information