DROK LM2596HV Voltage Regulator DC Buck Converter 4.5-55V to 1.25-30V Adjustable Step Down Variable Volt Power Supply Stabilizers It is a non-synchronous rectification non-isolated buck (sepic) module Input Voltage: DC 4 5-55v; output Voltage: DC 1 25-30v adjustable Output current: rated 2A, max 3a(need heat sink) if output power is more than 15W, please install heat sink Short circuit protection: current limiting, since the recovery Application: DIY adjustable power supply, DIY universal charger, power supply for electronic equipment etc