Input : 110V/220V, 47-63HZ Specification : DC12V 6Amp Constant Charging Voltage : 16.8V (4s li-ion battery) Constant Charging Current :6A Charging Mode : 3 Stages, CC, CV, Trickle Material : Aluminum alloy with Fan Dimension : 135*90*50mm Net Weight :0.7kg Application : Electric Vehicles & Tools Various Protection : Over current , Over Voltage , Over Temperature , Short Circuit and Reverse Polarity. Warranty: 12months Products can be Customized!