RAVEMEN NT101 Bike Tail Light with Turn Signals

Bike Turn Signals: Easily press the controller before turning, the bicycle turn signals will flash with a click sound, clearly indicating your direction (The sound can be muted) Ground Warning Lines: Ground warning lights project on both sides of your bike, alerting incoming vehicles to keep a safe distance Brake Detection: When braking, the rear bike light stays on for 2s to alert others, which is much safer when there’s traffic behind you Power-Saving Auto On-Off: The bike back light automatically turns off after staying still for 2 min and auto turns on if it senses movement Seatpost & Cargo Mount: Fit both round seatpost (28-35mm in diameter) and cargo rack mount; Some aero seat posts in similar sizes will also fit; Check the specs before purchase