Smart Bike Lights, 5 Light Modes, Brake Sensing Bike Tail Light for Night Riding, IPX6 Waterproof, Rechargeable Ultra Bright Rear Light Sensing for Cycling Road

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【Smart Brake Sensing】This automatic brake sensor-equipped bicycle taillight features a highly sensitive brake sensor. When you brake to slow down or stop, the taillight immediately increases its brightness to maximum (3 times the normal brightness) for 3 seconds, effectively alerting vehicles behind and improving riding safety
【 Light Sensing & Automatic Switching】 In intelligent mode, the built-in light sensor constantly monitors the surrounding ambient light, automatically turning on in low light and automatically turning off in bright light (without affecting brake light function). No need to focus on operating the taillights when entering tunnels or caves
【5 Dynamic Modes】Five lighting modes, switchable at will, designed to handle various day and night riding environments; short press for 1.5 seconds to turn on/off: steady light - slow flash - fast flash - strobe - breathing light cycle in sequence; in group riding, synchronized flashing; double-tap the taillight to automatically maintain the same breathing flashing frequency as surrounding taillights (within 50 meters)
【Battery Efficiency & Auto On Off】 The bicycle taillight is equipped with motion and light sensors and automatically turns off after 40 seconds of inactivity. It will turn back on once movement is detected or the bicycle starts moving. It features a 500mAh battery and supports Type-C charging. Battery life is approximately 11-45 hours
【Dual Mounting Options】This bicycle taillight offers both saddle rail and seatpost mounting options, making it compatible with almost all bicycles. The bracket and taillight are designed independently; simply rotate the bracket to screw the taillight into or out of the base cover while charging. For safety, please remove the mountain bike taillight from the bracket and carry it with you to prevent theft