AD36F12S : DC-DC Voltage converter. Insert the DC Plug into a DC socket with 9VDC - 32VDC range; the output (DC Socket) is 12VDC, with 3A maximum continuous current draw. Handy for step-down conversion of 28VDC power sources (airplanes), or 16V trucks, or any other higher-voltage source up to 32VDC. Dimensions: 3 3/4" x 2 3/4" x 1 3/4". Weighs 12 ounces. Has 3-foot long heavy duty cord. Can be hard-wired into systems as well. EXCLUSIVE BATTERIES AMERICA PRODUCT.