Features: Led Indicator Display:Comes with an LED indicator that lets you quickly check whether the connection is successful and allows easy usage in the dark or at night. Waterproof Design:With IP66 waterproof grade water and dust resistance by a rubber USB cover protects the internal circuit effectively enhancing its lifespan. On/off Switch:On/off switches for power control to effectively prevent power outflow save energy and extend the life of product and equipment. Protection Functions: Input overvoltage undervoltage protection; output overcurrent overvoltage undervoltage short circuit protection; reverse connection protection; chip internal. After-sales Service:If you have any problem please contact us immediately we will help you solve it as soon as possible. Specification: Material:ABS Size:5.2*3.7cm includes: 1*Charger Adapter 1*Wire Fuse "