Step Down With LED Voltmeter 4-40v, out 1.25-37V

1. Input voltage range: 4～40VDC
2. Output voltage range: 1.3-37VDC adjustable
3. Output current: 3A
4. Voltmeter range: 0 to 40V
5. Input reverse polarity protection
6. Built in output short protection function
7. Rectification: non-synchronous rectification
8. Conversion efficiency: 92% (maximum)
9. Switching frequency: 150KHz
10. Output ripple: 50mV (maximum) 20M-bandwidth
11. Load regulation: ± 0.5%
12. Voltage regulation: ± 2.5%
13. Operating temperature: -40 ℃ to +85 ℃

ON BOARD VOLTMETER:

1. Use on board switch to change display measurement between the input or output voltage, and a LED indicate which value(IN/OUT) is being measured. This setting is stored even after power off.
2. Voltmeter can be turned off, just keep the switch pressed for 1 second and leave it.
3. Adjust Input and output voltage measurement error offset - long press switch for 4 seconds or more, the digital display flashes, then short press the button to change the value of output (values range from -0.5 to 0.5, the unit is V), a positive number indicates an upward calibration, negative downward calibration. Now press the button again for adjust input offset in same manner.