DC-DC 5V to 1-24V ADJ USB Step Up Down Power Supply Module Buck Boost Converter Feature Low power supply Wide voltage output Support boost and buck Long handle potentiometer adiustment Parameter Input Voltage: DC 5V Output Voltage: DC 1.0V-24.0V Output Power: 3W(Max) Conversion efficiency:94% Working current: 30mA Working Temperature range:-20C~85CWorking Humidity range: 0%-95%RH Size:70*26*22mm USAGE Input DC 5V from USB male socket: Adjust output voltage by potentiometer to meet require: Remove input voltage Connect load at output terminal; Re-connect power ON and enjoy using NOTE Please don't short output lts maximum output power is 3W, which cannot be exceeded.