[5 light modes bicycle light] The front white and red backlight supports 5 light modes: constant high light, constant medium light, slow flash, rhythm flash, energy-saving fast flash, one-touch button. The maximum operating time in low speed mode is 25 hours. Press the button to change the mode as needed, and hold it for about 1 second to turn it off. The brightness can reach 20-120 lumens. [Waterproof, lightweight, durable] The bicycle light is made of IP66 waterproof material, and the USB interface is covered with waterproof and dustproof silica gel, which can protect the inside of the bulb well and extend the life bulb life. Adapt to different weather conditions, use PC plastic shell, you don't need to worry about anti-theft, it can be easily disassembled after parking and transportation. [USB charging indication / real-time battery] Built-in 500MAH rechargeable battery, it only takes a hour to fully charge. The USB charging port can be connected to computers, mobile power and other devices with USB ports for fast charging. Real-time battery indicator: green light (80%-100%); blue light (30%-80); red light (less than 30%) [Brake sensor and double-click switch in smart manual mode] When the tail light detects deceleration, it will be automatically highlighted for three seconds, up to 120LM, and the warning distance can reach 200 meters, with a wide range. This guarantees driving safety to some extent. Double-click the button in boot mode to switch from manual mode to intelligent mode. (Tail light) [Easy to install and remove] Easy to lock and secure. The bike's front and rear lights require no tools and can be easily installed and removed. Whether you're walking the dog, cycling, skating, hiking or camping, these super bright safety lights can keep you safe. Smart Bike Tail Light IP66 Waterproof Brake warning Light detection Automatic wake-up Vibration detection < p>Real-time battery indicator A set of headlights and taillights Press the button for 0.5 seconds to turn on/off the light. < p>After starting, click the button to change the speed: high steady light-medium steady light-slow-flash-tempo flash-ECO-flash. Smart bike tail light: it turns on automatically for 3 seconds when the brake is detected in manual mode or automatic mode. Smart bicycle tail light manual/smart mode switching: When the tail light is on, quickly double-click the switch button between the two modes. The [AUTO] indicator lights up in intelligent mode.