ITEM NAME:4.0-30V to 5.0-30V DC-DC Booster Convert Step Up Voltage Regulator LM258 EKN Descriptio n Note: When you test if the output voltage is not higher than the input voltage. Please adjust potentiometer clockwise, the output voltage will rise, please do not adjust the counter-clockwise. in the case of high input voltage module would be damaged. Features: Input voltage range: 4.0V-30V (must ensure that the output setting voltage is higher than the input voltage) Output voltage range: 5.0V-30V Input maximum current: 5A (According to Power conservation Calculate the nominal.We'd like to settle any problem in a friendly manner. (ventilation and heat dissipation in good condition Input maximum current: 5A. Continuous Current: 3A. We want to make sure you are happy with our item. ).