Dc Dc Buck Converter Step Down 8-22v 12v to 5v 3a Dc 3.5mm Power Adapter with 3m Cable input voltage: DC 12V (8-18V) (red cable DC+,black DC-) output parameter : DC 5V ,3.5MM output port. Output power: 3A 15W ; Work temperature:-25+60 full load temperature rise: 50 Load regulation:  1% ,voltage regulation rate:  2%