GIYO USB Rechargeable LED Bicycle Tail Light Intelligent Auto Brake Sensing Waterproof Rear Cycling Warning Light for MTB Bike

Smart Auto On/Off Brake Bike Light RearSpecification* Type: Highly Brightness Bike Taillights* Power Supply: USB & 350 mAH Li-on Battery* Light Color: Red* Charge: About 2.2 hours to fully charged, lasts for 10-35 hours* Net Weight: ≈26 gLight Modes: Constant / Flash (6 totally)Features 【Auto/Manual Mode】Automatically turn on/off depending on the light intensity, braking and motion, Automatically switch to sleep mode to save power, Press the button turn the cycling taillight on, then press button twice to change the different mode(auto sign turn on green light,auto mode open).* 【Battery Life】Built-in 350mAh Polymer Lithium battery comes with a USB cord that charges from your computer, wall charger, power bank or any other device with a USB port. After charging for about 2 hours, the tail light can work for 10—30 hours in different modes.* 【Mount System】Saddle mounting bracket and adjustable silicone strap provided, make the bicycle rear light flexible to quick install or detatch on bicycles. Very convenient to remove out from the bracket for recharging.* 【Brake Light】Super bright braking light promptly provide warning people behind.* 【Waterproof and dustproof】Against splashing water from any angle. Riding in the rain never be a problem again.