This is a BOSS GE-7 Equalizer. I am selling it because I haven't used it. There are no issues. Thank you. The BOSS GE-7 equalizer allows for multi-stage frequency adjustment. - Model: GE-7 - Brand: BOSS - Function: Equalizer - Connection Type: INPUT/OUTPUT - Power: 9V battery or AC adapter - Appearance: White/Gray body Thank you for viewing.