Features:  1. Wide field of view, effective recognition.180-degree field of view width, visibility up to 200m, utilization of high-brightness bright light but not dazzling, concentrated light source, high recognition, all clearly visible for night no matter rain or fog.  2. Automaticly start and stop, save time and no worry. Integrated vibration and light sensors, matching optimized algorithms.  3. Brake lights, same as car brake lights. Integration of high sensitivity acceleration sensor, automatically switch to brake light mode when decelerating, lights highlight warning rear car. 4. IPX5 rating waterproof; conveniently rotate the light to install, remove the light from its mounting base.  5. BT 4.2 connection: You can connect the light with App on your phone.  6. Built-in Li-ion battery that can be recharged by any device with a USB port, it can work for 16 hours after fully charged.   Specification:  Model: STL08;  Chip Type: STM;  Sensor:  Ambient Light Sensor, Three-axis Gyroscope, Accelerometer;  Wireless Connection: Bluetooth 4.2;  Mode: Driving light (Auto open), Braking Light (Auto open), Turn Light (Wireless control);  Lighting Angle: 180°;  Battery:  Lithium Ion Polymer Rechargeable Battery;  Battery Voltage: 3.7V/ 1200mAh;  Speaker Volume: 100dB;  Run Time: 16h;  Charging: USB charging;  Ingress protection: IPX-5 waterproof;  Material: ABS;  Size: Taillight: 61 x 59mm;  Remote Controller: 45 x 19.6mm;  Net weight: Taillight: 90g;  Remote Controller: 22g;    Package includes: 1 x Bike Tail Light;  1 x Remote Controller;  1 x USB Cable