Boomerang Wholly Roller Guitar Volume Pedal It's small It won't take up much precious pedal board space Can be a compact volume pedal: volume in / volume out or a compact expression pedal: 2 jacks to accommodate varying polarities of different effects 17" TRS patch cable is included Two through output jacks for connection to a tuner or for other signal routing Rugged 6" x 3; 5" x 2" steel chassis