USB rechargeable bike horn and light super bright 3 modes – multi purpose: 2 necessity in 1 for cyclist, bike horn and bike front light excellent performance: 140db bicycle horn, super loud to attract passer-by and vehicles; 250 – excellent performance: 140db bicycle horn, super loud to attract passer-by and vehicles; 250 lumen bicycle front light, ensure safety riding at dark night. – easily install and convenient use: 15.4 inch length of button wire, easily to mount on any place of the handlebar for convenient usage; mounting bracket is retractable silicon rubber belt, suitable for the diameter of the handlebar approx 0.5 to 1.4 inch. – rechargeable: with built-in 1200mah rechargeable battery, 2.5 hours full charging with micro usb, usb cable included in package – 3 modes – 5 voice cycle.