... circuit, overcurrent, overheat, overvoltage.application describtion: 1, suitable for IT products,Small household appliances ,toys,Audiovisual products , Communications ... output current constant,no drift 4,high security,suitable for high humidity,high dust,strong vibration. 5,long use ... ,tell us and we can deal with it for free♣ 30days for replacement,the condition is that our products have problem ...