mfr: VECTOR MFG. LTD. JUMPSTART PRO SYSTEM 12 V DC power supply, safety junpstart any 12 volt vehicle anywhere. Reverse polarity warning alarm-safety alarm system projects against reverse polarity connections. Easily converts in 110 volt AC power supply when used with DC to AC power inverter (not included). Built in 12-volt DC accessory receptacle. Keyless ON/OFF switch. 12 volt DC charger for use with cigarette lighter outlet/AC charger for use at home. 12V 19 Amp hour battery. Size 13.11 x 6.60 x 13.00