Features: brand new and high quality USB step up/ down power supply module, powered by USB, adjust potentiometer to get the required voltage. One button to turn off the output; Supply ON/OFF display screen; Support low power mode,sleep mode; Support both standard USB and Micro USB and pads input voltage; It is not a high power supply, please use it within the power range. Adjust potentiometer to get the required voltage; Specifications: Input voltage: for DC 3.5-12V; Output voltage:DC 1.2-24V; Input 1.2-2V,output power within 2W; Input 2V-20V,output power within 3W; Input 20V-24V,output power with in 2.5W; Display:3Bit digital tube display; Size:8X2cm/3.15x0.79in Material:Metal Package Includes: 1x USB Step Up/ Down Power Supply Module note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.