[ULTRA-BRIGHT LED BIKE TAIL LIGHT] Our bike tail light has 30 premium LED lights and up to 85LM brightness, it's bright enough to be seen at a distance of 150 feet in weather foggy/rainy or even in the dark night. It is very important that you are easily visible. The more visible you are, the safer you are. Your safety is no joke.[WIRELESS REMOTE CONTROL] Installed on the handlebar, it is easy to switch the lighting modes of the bicycle taillight by pressing the right and left controllers on both sides of the handle. Eight lighting modes in total: (Steady with full brightness / Fast flash / Smooth light / Turn left / Turn right / Explosive flash / Slow flash / Left-right flash). Much smarter than most competitors.[AUTO BRAKE LIGHT AND FLOOR WARNING LINE] The light will turn on to remind cars and pedestrians behind you when braking. The unique ground warning lane warns of any possible incoming vehicle, giving cyclists their own virtual lanes to further increase visibility.[USB RECHARGEABLE] Built-in 2000mAh rechargeable battery, keep working for 20 hours in flashing mode after fully charged / 32 hours in explosive flash mode / 5 hours in left-right flash mode. The remote control is equipped with a replaceable CR2032 button battery and can continue to work for 12 months.[IPX4 WATERPROOF] IPX4 waterproof level allows this bike rotating light to be used in light to moderate rain at -4 to 140F temperature - your best partner for outdoor cycling. MTB safety bike.