Bike Brake Taillight :

【Ultra Bright Bike Brake Taillight】A built-in integrated accelerometer ensures accurate brake detection, the rear light will automatically turn to brake modes to warn the car coming from behind when decelerating or emergency braking, great for riding on nights. 6 or 7 light modes for your choice: slow flash, breathing flicker, strobe mode and steady on.
【Saddle Fit & Tube Fit Strap-Install】 smart rear light offers two different install systems- Saddle fit and tube fit straps, whatever you want to put on-saddle or tubes, bicycle or helmet, easily to install in seconds without any tools
【USB Rechargeable Long Llife Battery】Built in Polymer lithium battery and Energy-saving designs, the rear bike light run time can be up to 50 hours. The taillight can be easily charged by charging cable via computers, chargers or power bank.
【IPX6 Waterproof & Shock Resistant】Rear light cover with anybody aluminum alloy case, not worry about the light will get wet by rain. Has excellent vibration resistance, can be used for any terrain