Evertech 24V AC to 12V DC Convertor Power Supply Adaptor for CCTV security camera Voltage Adapter - Converts 24V AC to 12V DC To Power Your 12V DC CCTV Security Camera. It is good to use for Running 12V DC over longer distances. Input: 20~30VAC Output: 12V DC 1.5 Amper Dimensions: 2.5"L x 1.125"W x .875"H