... :4.2V+-1% Product Name: Universal 4.2V adapter for charging 3.7V li-ion battery Product Feature:- Input voltage: AC100 ... -240V, 50/60Hz- Charging mode: CC, CV- Charging current: 1.2A at CC mode. (0.6A,0 ... ,2A optional)- Full charing voltage: 4.2V+-1% - Charging state indicator: Red - on charging, Green - full charge or idle- US plug, EU ...