1. [3-in-1] Smart bicycle taillight, which integrates three functions of bicycle taillight, bicycle turn signal and bicycle automatic brake light. It can ensure your riding safety, especially at night. 2. [USB Rechargeable] The bicycle taillight uses a 1200mah lithium battery, which can be charged via USB. Save time replacing batteries. The LED bicycle light comes with a charging cable and can be charged via a computer, mobile power supply or any device with a USB port. 3. [Smart Super Bright Bicycle Taillight] Our bicycle taillight is equipped with a real 80lm LED light, which can provide excellent lighting, ensuring long-distance riding in rainy and foggy weather, making your night travel more convenient and safe. 4. [Smart Turn Signal] During riding, if you need to turn to remind the oncoming vehicle, the rider only needs to tilt the bicycle to the left or right about 10°, the turning function will be automatically activated, and the turning arrow will flash 6 times to remind the oncoming vehicle to pay attention to the turn. 5. [Intelligent brake signal] During riding, if you brake, the built-in sensor will send a signal, and all 64 LED lights will light up and flash 6 times to alert vehicles behind.