Description: Properties: Synchronous step-down power Buck Power Input voltage: Input voltage: 12V ( DC 12-20V ),step-down power must ensure that the input voltage is higher than the output voltage 3V and above Output voltage: 9V ,Output Current: 2A MAX Protection: overcurrent protection, export short circuit protection, reverse polarity protection. Widely used in Car device, such as LED Display, Car Navigation, Car Audio, Car Radio,Hard Disk Player, MP3, DVD, GPS, et Specification: Volume size: 30mm x21mm x17mm (L x W xH). Package Includes: 1 Piece DC-DC 12V to 9V 2A Step-down power supply module