This new 12 volt inverter with sound control, has two modes. Costant and sound controlled flash. You are able to increase and decrease the sensitivity with a small dial. This is a high brightness unit that is sure to make some amazing effects. Will power 5-10ft of el wire. It is roughly 2 1/2" x 2" x 1 1/2". The sound control makes this a great unit for gaming case mods!