LEISHEN USB outlet is equipped with smart surge protector chips,which reads the power needs of devices connected to the USB ports to deliver optimal power.Chip charges at the optimal power allowed by the device,so your devices are protected from overcharging and overheating.3.6A 5V DC charging for the Type-A,provides the fastest charging to phone,ipad,other cells and multiple USB devices without adapter.Each USB port can reach up to 3.6A individually,with a maximum 3.6A output when both USB ports are in use.If the total power needs of devices plugged in are over 3.6A,the current will be distributed among the two USB ports.