Thank you for viewing. I have reconfigured the set contents that I was listing. This is an effects pedal set consisting of the Marshall Bluesbreaker II and the Behringer Noise Reducer. The BEHRINGER's knob is loose, but I have confirmed that it works. I have also confirmed that the Marshall works. Both have been tested and confirmed to be working, but please understand that these are used items before considering a purchase. - Model Name: Bluesbreaker II - Brand: Marshall - Type: Effects Pedal - Function: Overdrive You can enjoy the good old Marshall sound. - Model Name: Noise Reducer - Brand: Behringer - Type: Noise Reduction - Model Number: NR100