I purchased this over 5 years ago, but I've only used it about 3 or 4 times. I won't be using it anymore, so I'm putting it up for sale. The item itself is in good condition, but the box and instruction manual have scratches and stains. This is a 10-band graphic equalizer that allows you to adjust the sound quality. - Brand: MXR - Model Name: TEN BAND EQ - Function: 10-band graphic equalizer - Connections: INPUT / OUTPUT - Included Items: Instruction manual - Condition: Original box included Thank you for looking.