High power amp for various booster applications. Kit features short circuit and open circuit protection and has very low distortion (1% or less). Amplifier has red LED "on" indicator and will boost any tuner, radio, cassette, CD player to room filling volume out of your speaker! Size of board: 3.75" x 2.1". Operates from 12VDC. Complete with all parts, PC board and instructions. Skill Level 2.