I purchased this on Mercari at the end of the year, but I haven't had a chance to use it, so I'm selling it to raise funds to buy a musical instrument. The previous owner attached Velcro to the back to mount it on a board, which is convenient, but the serial number on the back has peeled off and cannot be confirmed. Other than that, there are no problems. I only tested it once to make sure it powered on, and this is a really great compressor! Please give it a try! The BOSS CP-1X compressor pedal provides high-quality sound. - Model Name: CP-1X - Brand: BOSS - Color: Blue - Included Accessories: Instruction manual, warranty - Function: Compressor Thank you for looking.