Rocktek overdrive & Maxon chorus set. The overdrive powers on, but the effect has not been confirmed. The chorus is unstable, with the power sometimes turning on and sometimes not. The on/off function via the pedal does not seem to work. The effect of the chorus has also not been confirmed. Purchased a long time ago and has been stored for many years. I have not checked for crackling or scratchy noise from the knobs. Please understand the above, and I would appreciate it if you would agree to no returns/no claims for this transaction.