4-Bit digital tube display Three input power modes Support short circuit protection Support constant voltage constant current adjust Multiple parameters can be displayed in turn This is a DC adjustable constant voltage constant current step up/down power supply module with LED digital tube display.Display output voltage, output current and output power.Adjustable output voltage and current.Set output current to meet the require.It can be used as ordinary buck power supply module, charger and LED constant current driver.Simple and efficient, practical Input Voltage for Pads: DC 4.0V-13.0V Input Voltage for USB: DC 5.0V Output Voltage: DC 0.5V-30.0V Output Current: 2A Output Power: 15W(Max) Voltage Display : +/-0.1V Voltage Display Resolution: 0.1V Current Display Range: 0-2.2A Current Display : +/-0.05A Voltage Display Resolution: 0.001A Power Display Range: -99.99Ah Capacity : 0.00W-15.0W Protection Temperature Threshold: 100 Conversion efficiency: 95% Working current: 30mA Short Circuit Protection: Yes Anti-backflow Protection: Yes Over-Current Protection: Yes Over-Voltage Protection: Yes Over-Power Protection: Yes Working Temperature range: -20C-85C Working Humidity Range: 0%-95%RH Color: As Shown Material: PCB Package Contents: 1 x DC-DC Converter 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.