Bicycle Light Automatic Direction Indicator Taillight Product description:- Light: 64-LED infrared bulbs- Battery: 1200 mAh polymer battery- Charging time: 3-4 hours Package: 1 x light Automatic direction change detection:The light automatically senses turns and changes. in direction and displays a corresponding turn signal.Light senses changes in direction and speed and displays corresponding indicators. - Dimensions: 58 x 71 mm- 80 Lumens waterproof bulb- USB charging- Durable construction FunctionsThe light detects changes in direction and velocity and displays corresponding safety indicators, like "left turn," "right turn," and "breaking" LED indicator patterns. Infrared safety line projector. Projects a red infrared line on the road behind the cyclist to help automobiles maintain a safe following distance. LED light display Display various patterns and arrows to remind the rear vehicle. Infrared warning light Provide a safe range for riding Durable USB charging port & fastening strapThank you!