Connect 2-24V to IN + and IN -Adjust the pontentiometer to putput your desired voltageOutput voltage is always higher than the input voltage;Output voltage: 400000 vPlease take an extra precaution not to feed the maximun input voltageThe current output is no more than 2AmpSpecificationThe maximum output current: 2 AmpThe input voltage: 2 v - 24 vThe maximum output voltage: 28 vEfficiency: Less Than 94%Size: approx. 35x15x6mm/1.37x0.59x0.23 inchNet weight: approx. 40gIncluded in this package12 x MT3608 2Amp DC-DC Step Up ModuleOnly the above package content, other products are not included.Note: Light 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.