It is a 15W Power Adapter/Voltage Regulator/Power Supply Module, Input voltage: DC 8~22V, Output voltage: DC 5V, Output Current: 3A Max. (2A,long-term work), Application: Power adapter, industrial equipments, electronic equipment, Communications Equipment, Power Tools, Car Driving Recorder, Car GPS, Car audio, LCD TV, Advertising screen, Monitoring System, LED lights, Fan, intercom and monitor system, etc.