Overview: Charges batteries outside of your phone to avoid heating up your phone Powered by AC 100V-240V 50/60 Hz US-Type Plug Charging output: DC 4.2V 350m A+/-50m AUSB power port output: DC 5.2V+/-0.02 == 800m A Specification: Dimensions: 3.27in*1.89in*1.1in Weight:1.69oz