BBB Cycling USB Rechargeable Bike Brake Light Intelligent Bicycle Light Waterproof Mountain Bike City Bike Road Bike Rear Light Easy Mount SignalBrake BLS-167

Bicycle Brake Light: This rear light is equipped with a g-sensor that activates the 50 Lumen brake light when it detects a decelleration Smart Battery: The light automatically goes to standby mode when the bike stands still for three minutes and has a Runtime Safety mode that extends runtime with at least four hours of flash Flexible strapmount: This bicycle rear light fits perfectly on all Ø 5 - 42 mm seatposts due to the sloped backside Waterproof: The self locking USB port protects your rear light from rain and keeps you going on your city and outdoor trips Easy to use: The memory mode provides extra convenience as it remembers what mode was used last