Total control switch design. One key can cut off the power,easy to operate. One click you can cut off the power directly while it is not using, easy and convenient. 5000 times press testing Silver contact switch is more safty. PC and ABS top fire proofing, anaerobic flame retardant, conform to the 750 Degree Celcius hot wire not burning,100 Degree Celcius heat not deformation. Automatic compatible without adaptation, and automatically assigned 0.1 to 2.4A, supply for the best current. Support one device 2.4A fast charging, automatic identification device, and matching charging current intelligently.