1.When you use the product the module inputs and outputs to be isolated from ground. 2.USB output voltage is consistent with the module not a fixed 5V output. When charging for digital equipment make sure USB output voltage is 5V. 3.Some customers report: “The module can not adjust the output voltage is always equal to the input voltage.” When you encounter this problem please counterclockwise rotation of the “voltage potentiometer” 10 laps or more then use the module you can adjust the output voltage. Because the factory default output voltage is about 20V. Specifications 1.Input voltage range: 5~36VDC 2.Output voltage range:1.25~32VDC adjustable 3.Output current: 0~5A 4.Output power: 75W 5.High efficiency up to 96% 6.Built in thermal shutdown function 7.Built in current limit function 8.Built in output short protection function 9.Input reverse polarity protection: None (if required high current diode in series with the input). Specifications 1.Input voltage range:5-36VDC 2.Output voltage range:1.25-32VDC adjustable 3.Output current: 0~5A 4.Output power: 75W 5.High efficiency up to 96% 6.Built in thermal shutdown function 7.Built in current limit function 8.Built in output short protection function 9.Input reverse polarity protection: None (if required high current diode in series with the input).