Set of 5 units: ARIA ADT-1 DISTORTION Guyatone PS-016 DISTORTION LIMITED BEHRINGER UT100 ULTRA TREMOLO BOSS CT-6 Auto Tuner BOSS FS-5L * The Guyatone PS-016 DISTORTION LIMITED has some paint chipped off. Also, the BEHRINGER UT100 ULTRA TREMOLO has a faulty input jack, so its operation has not been confirmed. The other models functioned, but they are old, so there is some scratchiness in the knobs. These items have been used, so they are not in pristine condition. Please understand that these are used items and only purchase if you are comfortable with their condition and can perform maintenance yourself.