4-port USB charging socket output DC 5V / 2.1A; 5V / 2.1A; 5V / 1A; 5V / 1A. - Meets USB charging standard suitable for IPOD cell phone MP3 player etc portable products. - Designed with one power indicator blue light indicates in charging - Intelligent CPU control charge with the pulse constant current trickle charge timing protection DeltaV control - Safety water resistant one-time modeling without screw design of shell - Concave design overload protection switching high-quality environmentally friendly LED lights display switch button. When an overload occurs quickly cut off the power to protect the safety of electrical equipment excluding overload restart the switch can be re-used without replacement fuse. - Rated current 10A rated voltage 250V maximum using power 2500W. - Passed CCC safety certification ensures security. - Wearing resistant and environmental with the RoHS certification. - Switch operating life span over 30000 times socket operating life span over 5000 times.