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