... cut off the internal circuit, so can protect battery from being damaged.4. Self protection design, when the ... v, it would automatically shut off, ensure the battery has enough power start vehicles.5. Overheating or ... v input, 24 v input, cigarette lighter input, battery direct input; 220 v ac output, 110 v ac ... to oxidation and beautiful shape. made in china Inverter From China, 500W , Output 110/220V