NATFIRE A07 Smart Bike Tail Light Brake Sensing Rear Lights Auto on off USB C Rechargeable Safety Warning Cycling Lights ULTRA-BRIGHT LED BIKE TAIL LIGHT Natfire A07 bike tail light have 16 high-end LED lights and the brightness up to 100 LM, its bright enough to be seen from 150ft away in foggy/rainy day or even in dark night. Smart Standard Version Installed it on the handlebar, easy to switch the lighting modes of the bike rear light by holding 3 seconds of the button. Total 3+1 lighting modes: (Steady with running mode 1, running mode 2, double flash + strobe). AUTO BRAKE LIGHT The light will flash light to remind the cars and pedestrians behind you when braking. Warning any possible incoming vehicle to further increasing visibility. USB RECHARGEABLE Built-in a 800mAh rechargeable battery, keep running for 17-35 hours under the flashing light mode after fully charged. (If you use 2 hours one day, you can use 10 days) EASY INSTALLATION You can install the taillights/back light without any tools on almost anywhere (mountain/kids/road bicycle, stroller, wheelchair, motorcycle, scooter, e-bike), detaches it in 1 seconds and become a compact but powerful emergency flashlight. Keep it inside your car, basement, attic, and emergency kit. Tips: If you do not use it for a long time, please charge it every three months. Do not shine into the eyes. Keep away from flammable and explosive materials. Waterproof grade is IPX5. Do not immerse the bicycle light in water. Place the bicycle lights correctly. Keep out of reach of children to avoid accidents.