5 Lighting ModesThe taillight supports 5 lighting modes: always on, always on, slow flash, rhythm flash, energy-saving fast flash. The maximum operating time in low speed mode is 25 hours. Press the button to change the mode as you need and hold it for about 1 second to turn it off. The brightness of the rear light can reach 20-120 lumens.Brake sensor and double-click switch in intelligent manual modeWhen the rear light detects deceleration, it will automatically highlight for three seconds, up to 120LM, and the warning distance can reach 200 meters, with a wide beach. This guarantees driving safety to a certain extent. Double-click the button in the power-on state to switch from manual mode to intelligent mode.Waterproof, lightweight and durableIP66 waterproof material is used, and the USB interface is covered with waterproof and dustproof silicone, which can protect the interior of the bulb well and extend the service life of the bulb. Adapt to various climatic conditions, using PC plastic shell, no need to worry about anti-theft, it can be easily disassembled after parking and transportation.Real-time USB/Battery Charging IndicatorBuilt-in 500MAH rechargeable battery, it only takes 1 hour to fully charge. The USB charging port can be connected to computers, mobile power supplies and other devices with USB ports for fast charging. Real-time battery indicator: green light (80%-100%); blue light (30% to 80); red light (less than 30%)Easy to install and disassembleEasy to lock and repair. The led bicycle taillight does not require tools and is easy to install and disassemble. Whether walking the dog, biking, skating, hiking or camping, these super bright safety lights can keep you safe.