Waterproof and high-brightness: With 30 3W high-brightness LED lamp beads, it can achieve high-brightness, soft and non-bright light effects. After sealing processing, it has life-like waterproof function, but it should not be soaked in water.Intelligent brake detection: With the brake sensor inside, this intelligent bike light automatically turns into strong light when braking. The bike light is super bright at this time and also highly visible from a distance. Attract the attention of bicycles and vehicles to improve your safety when cycling.6 Lighting modes: This smart bicycle taillight supports six flashing modes: high light, standard light, low light, low light flash, strong light flash, and fast flash. The working time is about 5 hours, depending on different lighting modes.Manual mode: long press to turn on and off, short press to switch the flashing mode. In the shutdown state, short press the switch to enter the highlight mode; In the highlighted state, short press the switch to enter the medium-bright mode; In the medium light state, short press the switch to enter the low light mode; In the low light state, short press the switch to enter the low flash mode; In the low flash state, short press the switch to enter the high flash mode.Easy to use: No tools are needed, just use the attached rubber band for fixed use, durable material, light and portable, suitable for various outdoor riding sports.