Price reduced from 13,800 yen to 12,800 yen. The TRI-O.D. effector provides a variety of overdrive sounds. It can switch between three Over Drive types named tweed, carif, and britsh, and the drive amount and level of each can be set. Turning the level all the way to the left turns the channel off. There are also bass and treble knobs, allowing you to adjust the low and high frequencies, emphasizing or suppressing them. I purchased it used a year and a half ago and have only used it in my room. I mostly practice guitar acoustically, so it hasn't been used for more than 10 hours in total, but I don't know how much the previous owner used it. I am selling it to reduce the number of items I own. - Model name: TRI-O.D. - Brand: TECH 21 NYC - Number of switches: 3 - Output terminals: 1 - DC input: Yes There was no knob noise. I think it works very well. No accessories included. Operates on DC9V. Non-smoking, no pets. Thank you for viewing.