【FRESNEL LENS DESIGN】The design of Fresnel lens is applied to this bike tail light, and it makes the light 1.5 times brighter than normal types with same LED lights, making you more visible in the night.

【INTELLIGENT BRAKE SENSING】With the build-in brake sensor, when you brake, the bike rear light will instantly become much brighter and keep for 3 seconds to alert the pedestrians and vehicles behind you.

【SMART LIGHT SENSING AUTO ON/OFF】Under automatic mode, the build-in light sensor can detect ambient brightness and turn the bike light on or off automatically according to riding and quiescent state.

【6 LIGHTING MODES ADJUSTABLE】 After long press the switch to turn on the taillight, you can click the switch to choose preferred light working modes from steady light, breathe flash, slow flash, quick flash, rhythm flash and ECO flash.

【WATERPROOF & USB RECHARGEABLE】IPX6 waterproof bicycle tail light against rain and splashing water. Built-in 350mAh Polymer Lithium battery can be charged through USB cable. The single full charge time is about 2 hours.