Bike front light is designed for brightness of 300 lumens, up to 500 ft illuminating distances, 95° light angle and 4 lighting modes to choose, lights the road ahead; Bike tail light has 220°and 700ft visibility, also 4 lighting modes, alerts drivers to your presence so they know to give you enough space No more costs on batteries! The front bike light has a 1500mAh internal battery, which charges 2-3 hours through Micro USB port and uses 5-8 hours; The bike tail light also has an integrated 330mAh battery and a full charge takes about 1.5 hours only. This bicycle computer works well to measure and record speed, distance and riding time, which are what any serious bicyclist or fitness fanatic needs to know. Bicycle front light and horn 2 in 1 design. The bike horn can emit a warning sound up to 120 dB and there are 6 sounds to change Bike odometer computer has 5 modes to switch--ODO, DST, MXS, AVS, TM. Precise measurement adjustable for viewing total distance, one way record ,maximum speed, average speed, and cycling time, suitable for outdoor cycling trip and bicycle training. Bike front light is made of high quality ABS material, IPX65 rated, which means no need to release it if you get caught in the rain. The surface of piano paint technology, strong and durable. Also this rear light is IPX4 waterproof Without any tools, the bike light set can be easily installed and released. The light weight and sturdy shell insure stable performance which is very eseential when riding on complex terrain. More than a bike light, also can be used as an emergency flashlight, torch, helmet headlight for cycling, camping, walking, or other nighttime work.