1.Description: USB boost/buck power supply module, powered by USB, adjust potentiometer to get the required voltage. 2.Features: 1>. One button to turn off the output; 2>. Supply ON/OFF display screen; 3>. Support low power mode; 4>. Support sleep mode; 5>. Support both standard USB and Micro USB and pads input voltage; 6>. Potentiometer with rotating handle. 3.Parameters: 1>. Input voltage: DC 3.5-12V; 2>. Output voltage: DC 1.2-24V; 3>. Output power: Input 1.2-2V, output power within 2W; Input 2V-20V, output power within 3W; Input 20V-24V, output power within 2.5W; 4>. Display: 3-bit digital tube display; 5>. Size: 80*20*14mm. 4.Use steps: 1>. Input voltage from Standard USB or Micro USB or 'VIN+' and 'VIN-'; 2>. Turn ON display screen; 3>. Adjust potentiometer to get the required voltage; 4>. Connect load.