EP-Booster, offering a vacuum tube-like sound. - Model Name: EP-Booster - Brand: Xotic USA - Connections: IN/OUT - Switch Type: Footswitch - Features: Vacuum tube-like boost effect Thank you for looking. The subtle boost that makes the sound of weak pickups shine is the best. You can enjoy a different flavor depending on whether you place it before the distortion or at the end of the chain. Box included. Thank you.