This unit is designed for charging/maintaining Lithium-ion batteries. Input: AC 120V 60Hhz Output: DC 12V 2A Built-in curcuit protection guards against overcharging, short curcuit and reverse polarity. Shock resistance ABS material Convienent, color-coded ring terminals and alligator clips for easy, correct installation. Fully-Automatic: Powers on when needed and leave it for long time maintanence. Reverse polarity indicator Power on LED indicator Charge Indicator: RED LED indicates the battery is charging, GREEN LED indicates it is fully charged and enters maintenance mode. WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov This warning is being provided to comply with the State of California's Proposition 65.