Regulator : LM2596 DC-DC Buck Converter module
Input voltage: 4V ~ 35V
The output voltage : 1.23V ~ 30V
Output Current : 3A( Max)
Conversion efficiency: 92%( MAX )
Output ripple: <30mV
Switching frequency: 150KHz
Size :43mm * 21mm * 14mm (Length*Width*Hight)

Features:
Input voltage: 3.2 V to 40 V dc (input voltage must be higher than to the output voltage, Buck Converter)
Output voltage: 1.25 V dc to 35 V volt adjustable with the potentiometer.
Maximum output current is 3A.