I purchased this used and have only used it once. It works without any problems. Since the separately sold AC adapter is also included, the price is set a little higher. Please consider it. The G1X FOUR is a multi-effects processor that enriches guitar playing. - Model Name: G1X FOUR - Brand: ZOOM - Connection Terminals: Input jack, Output jack, USB port - Foot Switch: Two foot switches - Display: LCD display - Power: AC adapter included Thank you for looking.