6-Band Graphic Equalizer Made in 1994, purchased in 1996. It runs on battery power only, with no power supply or footswitch, so it's always on when connected. One screw is missing from the back cover. Functionality has been confirmed, but it's an old item, so there may be some crackling, but it should not affect use. - Brand: MXR - Model Name: Six Band Graphic Equalizer - Number of Bands: 6 - Frequency Bands: 100, 200, 400, 800, 16k, 32k - Input/Output Terminals: 1/4 inch jack - Included Accessories: Warranty - Color: Blue Thank you for viewing.