Bicycle Smart Braking Carbon Fiber Vibration Sensing Rear Light Warning Light, CY120

1. Battery capacity: 400mAh
2. Runtime: About 8-40 hours
3. Charging port: Type-C
4. Material: carbon fiber + PC
5. Charging voltage: 5V
6. Waterproof rating: IP65
7. Size: about 3.8 x 2.95cm
8. Weight: about 27g
9. Package list: light, stem mount assembly, seatpost mount assembly, charging cable

Features:
1. Instantly triggers maximum brightness (approx. 2 seconds) upon braking to alert following vehicles
2. 6 selectable light modes, toggle with single click: Single Flash / Double Flash / Breathing Flash / Steady On / Running Light / Spinning Wheel
3. Auto-sleep after 2.5 minutes of inactivity; vibration automatically activates tail light (Note: Requires Smart Mode enabled (blue light flashing))
4. All LEDs illuminate at 100% battery; corresponding LEDs dim or turn off as charge level decreases
5. Light-sensitive sensor automatically dims lights in bright environments
6. IP65 waterproof rating withstands harsh weather, rain, and muddy conditions