Technical engineers,after-sales engineers,are you still worried about the collocation of 3.3v,5v,12v,24v power?This product easily solves your problem with a variety of power supplies.This power is very convenient to use, you just plug in USB or micro USB can output 1.2V to 24V of adjustable voltage, power 3W,very suitable for technical engineer research and development, debugging instrumentation,after-sale engineers to repair the power supply of instrumentation,very convenient. Feature: 1.Very convenient to use, plug in USB or micro USB can output 1.2v-24v adjustable voltage 2.One-click on and off output 3.Digital can be closed 4.Multi-circle Precision adjustable potentiometer adjustment 5.Before the electric power storage state Specifications: Input voltage:DC 3.5-12V Output voltage:DC 1.2-24V Output power: 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 One button to turn off the output Supply ON/OFF display screen Support low power mode Support sleep mode Support both standard USB and Micro USB and pads input voltage; Potentiometer with rotating handle. 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. Application: 1.Ordinary power supply 2.Battery charger 3.LED drive power 4.Instrument voltage display 5.Test meter 6.Circuit test 7.Power conversion Size:6.4x2.2cm/2.52x0.87inch Note: Please allow 1-3mm error due to manual measurement.pls make sure you do not mind before you bid. Due to the difference between different monitors,the picture may not reflect the actual color of the item.Thank you! Package Includes: 1x USB Step UP/Down Power Supply Module