Here is an excellent pedal from Electro Harmonix, in good used and functional condition and includes the original box and instructions. Writing in marker on each side to describe where to place cables. See pics. Electro-Harmonix Knockout Attack Equalizer

The Knockout is a powerful two-filter combination that can make your Les Paul sound like a Strat and your Strat sound like a Tele. Its secret...the Knockout has a 7 pole filter for sculpting the low end of your mids and a 6 pole filter to shape the top end of the mids. This provides incredible tone shaping. Use after distortion to bring out the heavy weight punch of the metal masters. The Knockout is also truly amazing on Bass.

• True bypass
• Tough and compact die-cast chassis
• 9-volt battery included
• Optional 96DC-200BI power supply available
• Dimensions in inches: 4.0 (w) x 4.75 (l) x 2.25 (h)
• Dimensions in mm: 102 (w) x 121 (l) x 89 (h)