I purchased this new and used it for practice at home and in the studio. I am selling it to downsize my pedalboard. Velcro is attached to the back. The APHEX Punch Factory is a bass effects pedal that allows you to adjust the input, output, and ratio. - Brand: APHEX - Model Name: Punch Factory - Input Adjustment: INPUT - Output Adjustment: OUTPUT - Ratio Adjustment: RATIO - Meter Display: dB Thank you for looking.