This is the level control, louder to the right, quieter to the left.
This is the tone control, thicker tones to the right, brighter to the left.
This is the gain control, more fuzz to the right, less to the left.
9v Battery or any standard 9 volt DC power supply with a negative center 2.1mm barrel.
(L x W x H) 5 x 3 x 2