DC-DC STEP DOWN CONVERTER VOLT REGULATOR 5V-23V

This device converts incoming DC voltage (max 23v) and will out put 1v-17v depending on how you set it. Very ueful for many tasks in model railways.
 
Please note soldering skills are required to attach this device to wires. 
 
Specification:
Size: 17*11*3.8mm
Color: multicolor
Material: electronic components
Input voltage: 4.75V-23V
Output voltage: 1V-17V
Output current: 3A peak,  1.8A for long time