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.

Features: 
• 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)