MXR Dyna Comp Mini Compressor Pedal M291 The Dyna Comp Mini Compressor combines the best of classic tone and modern convenience in a housing thats nearly half the size of the original. Thanks to its rare CA3080 metal can integrated circuit (IC), this pedal yields quieter operation, greater transparency, and increased dynamic range. An all-new Attack switch toggles between slow and fast attack times. Features: Classic MXR compression in a space-saving mini housing Features rare CA3080 metal can IC for quieter operation, greater transparency, and increased dynamic range All-new Attack switch toggles between slow and fast attack times Power supply not included