SMAKN&reg; 5V to 12V 5W ultra-small volume boost power supply module Input voltage: 2.5-12V. Output voltage: 12V  0.1V. Output Power: 4W or less long term. Wiring is defined: Vin as the input positive, VOUT is the output positive, GND for the input and output common ground. Size:13mm * 8mm.