Features :  
--Input voltage: DC 4.5v-24V
--Output Voltage: DC 0.93V-20V (Buck Mode, input voltage must be 2V higher than output voltage)
--Output Current: 0-2.00A (Adjustable)
--Output Power: 20W MAX 
--Ammeter: 0.00-2.00A ( display output current only)
--Voltmeter: input 4.5-24V, output 0.9-20V
--Display led Color: Red
--Size: 52 mmx 33 mmx 18 mm
--Left Switch: Boot default display voltage **. * U, Press switch display *.**A, Press switch again display voltage and current 5S alternate display, Press Switch again display voltage.
--Right Switch: switch for display Input Voltage or Output voltage
--LED Indicator: Blue for Constant Current Working status; Red for input voltage status.
--Left VADJ potentiometer: Clockwise step up voltage, Counterclockwise step down voltage (constant voltage working status)
--Right VADJ potentiometer: Clockwise step up current, Counterclockwise step down current (constant current working status)
Note:
Please DOn't use the module to charge battery. if the output voltage stop charging, the battery voltage will damage the DC Converter. or please install a diode at the output postive port.

IF you need adjust the current ,please use the  Multimeter Current position to short the output , then the "CC" LED will on , you can adjust the current now.