Qunqi 5pack MP1584EN Ultra Small DC-DC 3A Power Step-Down Adjustable Module Buck Converter 24V to 12v 9V 5V 3V for Arduino Description Features: Input Voltage: 4.5V to 28V Output Voltage:0.8V to 20V Output Current: 1.8 A typical (3.0 Max) Output Ripple Frequency: 340 KHz Ripple Voltage: 30mV Product Details: Brand: Qunqi Color: green black Item Weight: 0.02 Pounds Input Voltage: 28 Volts Output Voltage: 20 Volts Package Dimensions: 2.5 x 2 x 0.1 inches Item Weight: 0.32 ounces Item model number: 2699029154 Is Discontinued By Manufacturer: No Date First Available: September 5, 2015 Manufacturer: Qunqi