... input and output DC-DC 3-35V Step Down Adjustable Power Supply Module Input 9-35V DC,output 12V,1A,or ... -1Dimension:62x21x20mm. (2)input(3V~35V),output (1.25V~37V)adjustable, (3)the max current(when step up the voltage)3A ... 2A,the power is 15W, efficiency up to 90% clock wires is increase voltage,anticlockwise is decrease the voltage adjustable switching power supply