XWST DC to DC Buck Converter 12v 24v to 3V 3.3V 3.7V 4.2V 6V 7.5V 9V Step Down Voltage Reducer 1A to 30A Power Supply XWST DC to DC Buck Converter 12v 24v to 3V 3.3V 3.7V 4.2V 6V 7.5V 9V Step Down Voltage Reducer 1A to 30A Power Supply. Sale price : $7.77 Category : Home Improvement