1.Low power supply 2.Wide voltage output 3.Support boost and buck 4.Long handle potentiometer adjustment 5.ZK-DP is a DC adjustable step up/down power supply module with 3Bit LED digital tube display.Display output voltage in real time.Rotate potentiometer to adjust output voltage.Set output voltage to meet the require.It can be used as ordinary buck power supply module.Simple and efficient, practical. Product Name:ZK-DP DC-DC 3W USB Step Up Down Power Supply Module Product Number:ZK-DP Input Voltage:DC 5V Output Voltage:DC 1.0V-24.0V Output Power:3W(Max) Conversion efficiency:94% Working current:30mA Working Temperature range:-20℃-85℃ Working Humidity range:0%-95%RH Using Steps: 1.Input DC 5V from USB male socket; 2.Adjust output voltage by potentiometer to meet require; 3.Remove input voltage; 4.Connect load at output terminal; 5.Re-connect power ON and enjoy using. Note: 1.Please donrsquot short output. 2.Its maximum output power is 3W, which cannot exceed. 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. Colour:Green Screen/Red Screen Material:Metal+Plastic<br><br>Package Contents: 1 x Power Supply Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.