DROK Adjustable Automatic DC-DC Non-Isolated Buck-Boost Voltage Converter Regulator 3.8-32V to 1.3-35V 5V 12V 24V 3A 12W Step-up Step-Down Power Supply Transformer Module Board

Features:
Module Properties: Non-isolated step up and down module
Input voltage :DC 3.8-32V
Output voltage :DC 1.25-35V continuously adjustable
Input Current: 3A (MAX)
Output power:  12W (natural cooling, input voltage is more than 10V), please do enhance heat dissipation if it works on high current applications.
Size: 53 x 25 x 13.5mm

this module built-in NMOS transistor, the conversion efficiency is higher than LM2577 triode.
This module is automatic adjustable voltage module, the module can be adjusted by adjusting 3296W precision multi-turn  adjustable potentiometer to change the output voltage. The maximum output voltage is 35V. Clockwise turn boost,counterclockwise turn buck.
With input reverse polarity protection (only protect reverse current 1A or less)

Package include:
1x DC-DC Boost Buck Converter