The Ampeg Opto Comp Analog Optical Compressor pedal utilizes an optical circuit to deliver smooth, vintage style compression to add headroom and sustain to your guitar or bass. Dial in a fast, subtle style to control peaks or crank up the compression to add a unique character. Featuring a roadworthy all-metal chassis and true bypass switching, the Opto Comp Analog Optical Compressor brings your tone to new heights.Feature Bullets• Delivers smooth, vintage style compression• Dial in the perfect sound with Compression and Release controls• Output control allows you to maximize sustain and make up for heavy compression• True bypass, analog design with incredible signal-to-noise ratio• Roadworthy all-metal chassis construction• 9V DC supply or battery capable (not included) This compressor is lightly used and we'll ship it to ya safely and swiftly! Give us a shout at the shop with any questions you may have.