• Circadian light perception automatically turns on the lights
• Automotive grade turn signal beep at the same time
• Vibration sensor automatic lighting
• IP65 is waterproof and dust-proof
• Anti-theft alarm bell one-key arming

Specifications:

• Material: PC + UV resistant material
• Weight: about 123g (tail light only)
• Waterproof: IP65
• Battery: 3.7V 1500mAh lithium battery
• Charging: Type-C port
• Function: tail light, brake highlight, electric bell, anti-theft alarm, turn signal

Note: The mounting bracket is for a 27-40mm round seatpost, a flat seatpost can't be mounted.