Q2S Tail Light Brake Sense USB-C

Brake Sensing + Auto Light + Vibration Detection
During riding, the tail light detects braking through G-sensor changes such as braking or vibration. When braking is sensed, the light automatically switches to maximum brightness for about 3 seconds in any mode to warn vehicles and pedestrians behind. Built-in light and vibration sensors enable automatic on/off: the light turns on in low-light conditions, switches off after about 30 seconds of being stationary, and reactivates instantly when vibration is detected.
(*Please refer to images for supported modes.)

Multiple Lighting Modes with One-Click Control
The rear light features a high-transparency PC lens and bright LED for soft yet clear illumination with wide visibility. It supports free switching between lighting modes using a single button:

• Slow Flash
• Breathing Flash
• Burst Flash
• Always On

Simple one-click operation allows quick mode changes while riding, with a memory function that recalls the last used mode.

IPX6 Waterproof & Lightweight Shock-Resistant Design

Rated IPX6 waterproof to handle sudden rain (not recommended for long-term rain exposure or submersion).

Impact-resistant housing weighs only 22g.  

Compact size (approx. 3 × 2.9 × 3.8 cm) makes it easy to carry in a cycling bag or pocket.