Thank you for viewing. This is a listing for a set of 4 guitar effects pedals. Mighty Sound Delay DONNER Extreme Driver DONNER Noise Killer DONNER MORPHER All of them were recently used on my board for live performances, so there are no operational issues. Would these be suitable for creating a compact pedalboard? Velcro is attached to the back, and there are some scratches from use. Please understand that these are used items before considering a purchase. They will be shipped using recycled materials.