Gain: Turn to the right to increase gain, to the left to decrease gain.
Treble: Turn to the right to increase treble, to the left to decrease treble.
Output: Turn to the right to increase output, to the left to decrease output.
4.00″ x 2.30″
9 volt Negative tip adaptor and a 5.5mm x 2.1mm jack.
9 volt Battery