Usb Smart Bicycle Brake Tail Light

Automatically turn on or off in response to motion, braking, and light intensity. Automatically enter sleep mode in order to conserve energy. To switch between modes (auto sign turning on green light, auto mode open), push the button twice. This will turn on the cycling taillight.

With the included USB cord, you can charge the built-in 350mAh Polymer Lithium battery from your computer, wall charger, power bank, or any other device that has a USB port. The tail light can operate in several settings for 10 to 30 hours after charging for roughly two hours.
The adjustable silicone strap and saddle mounting bracket allow the bicycle rear light to be quickly installed or detached on bicycles.
Extremely bright braking lights quickly alert others who are behind.
against any direction of water splashing.

Specification:

Type: Highly Brightness Bike Taillights
Power Supply: USB Lamp; 350 mAH Li-on Battery
Light Color: Red
Charge: About 2.2 hours to fully charged, lasts for 10-35 hours
Net Weight: 26 g
Light Modes: Constant / Flash (6 totally)