ULTRA-BRIGHT LED BIKE TAIL LIGHTX5 bike tail light have 30 high-end LED lights and the brightness up to 85 LM, its bright enough to be seen from 150ft away in foggy/rainy day or even in dark night.WIRELESS REMOTE CONTROLInstalled it on the handlebar, easy to switch the lighting modes of the bike rear light by press the four buttons on the controller. Total six lighting modes: (Steady with full brightness/ Fast Flash/ Flowing Light/ Turn Left/ Turn Right/ Ground Line).AUTO BRAKE LIGHT & GROUND WARNING LINEThe light will hightlight to remind the cars and pedestrians behind you when braking. Unique ground warning lane warns any possible incoming vehicle, providing riders with their own virtual lanes to further increasing visibility.USB RECHARGEABLEBuilt-in a 2000mAh rechargeable battery, keep running for 5-8 hours under the flashing light mode after fully charged.