Long battery life: Bicycle headlights can be charged via USB. It can be charged via your computer or any device with a USB port. Powered by a 5V 1200mAh rechargeable battery pack (included), it takes 2 hours to fully charge. The headlights have 5 modes: automatic sensor mode, side warning light, medium light, strong light, and strong light flashing.Multifunctional bicycle light: Use as a flashlight and put it in an emergency kit. In addition to being a 360-degree revolving flashlight for bicycles, the mini safety flashlight can also be installed on the attached headband mount as an emergency flashlight for outdoor sports.Easy to install: easy to install, no tools, just a few seconds to install and remove Just turn the hardware by hand until it is tightened and fixed in the desired position on the bicycle handlebar, just unscrew the light on the fixing frame so that you can carry it with you when the bicycle is locked out.Simple and safe-this rechargeable bicycle light set is installed with a simple groove and a highly elastic rubber band. The rubber band is very fast, easy to install and disassemble, and the great flexibility makes the belt easy to adjust to suit different types And sizes of handlebars, seatposts, etc. No matter on rough or uneven roads, the bicycle light can be firmly fixed on the frame without shaking or falling to ensure your safety and reliability.