The PSM-12 from Atlas is a 12VDC power supply. It has a 6' cord to give you plenty of reach. A 3.5mm mini plug is included with the power supply that allows you to connect directly to the M-1CB4B connector block, or up to three switched WhisperTouch volume controls.
In the Box
Atlas Sound PSM-12 - 12VDC Power Supply for WhisperTouch