Description: DC-DC Voltage 2A Step Up Adjustable Boost Converter Module Power Supply Adjustable step-up power converter module, the step-up circuit board is a good efficiency non-isolated boost module. Input: DC 2 V to 24 V, optimum operating voltage range: 2V to 28V; Output: DC 5 V to 35 V voltage is continuously adjustable, maximum output current is 2 A Step-up boost converter module: they can fix on the emergency lamp or other electronic devices between the corresponding voltage range, DIY an output adjustable mobile power, boost charger, etc. Specification: Material: PCB Board Color: As picture show Size(LxWxH): Approx. 23x15x12mm/0.91x0.6x0.47inch Package Includes: 1 piece Adjustable Boost Converter Note: When the output voltage of module cannot be adjusted and is equal to the input voltage. You should rotate potentiometer clockwise more than 30 times and then you can adjust the voltage normally. Voltage Regulation: Potentiometers face your chest, rotate potentiometer clockwise to boost! Pls allow an error of 1-3mm due to the difference of manual measurement.