ULTRA-BRIGHT LED BIKE TAIL LIGHT X5 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 highlight 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 5-10 hours under the flashing light mode after fully charged. The remote controller equipped with a CR2032 replaceable coin cell battery and it can keep working for 12 months. BUY WITH CONFIDENCEWe accept returns within 30 days without any reason and offer the replacement of products or accessories within one year. Please feel free to contact us if you have any problems, we will do our best to help you.