SMAKN&reg; DC / DC Converter 6.7-22V Step Down to 3.7V / 3A Power Supply Module Input voltage: DC12V(Wide voltage 6.7-22V). Output voltage: DC 3.7V. Note: The step-down power, the output voltage is always less than the output voltage, please ensure that the lowest pressure 2V. Output Current: 3A (2.5A or less long-term work without any cooling). Output Power: 11W.