The BOSS CS-1 Compression Sustainer is an effects pedal that enriches guitar sound. - Model: CS-1 - Type: Compression Sustainer - Color: Blue - Input Terminals: 1/4 inch jack - Output Terminals: 1/4 inch jack There are scratches and dirt. Sometimes there is crackling in the knob switches. The back of the pedal in the third photo seems like the previous user peeled off the rubber. Velcro is easy to apply. Please understand that this is a used item. Thank you for viewing. Manufacturer: BOSS The crackling disappeared while using it.