This is our 12 volt (DC) sound controlled inverter. It has: constant on, off, and sound controlled flash. Sensitivity is easily adjusted with slider control. This inverter powers from 10 to 60 feet of our Quick-Connect high bright el wire. Perfect for any mid-sized automotive, home, and portable uses. Just wire to any 12 volt DC power source. (Available with cigarette lighter, home AC, or 12v battery pack adapter) Approximate dimensions: 2 1/2” x 2” x 1 1/2”.