Thank you for viewing. This is a listing for a mute (attenuator) for alto saxophone for indoor practice. This is a very convenient device that allows you to enjoy playing without worrying about practicing at night or disturbing your neighbors. What I would like to highlight is that the internal felt is very clean. I am concerned about the unsanitary feeling when the inside is dirty. Also, the rubber part where you put your hand is in very clean condition, so you can use it comfortably. There are no noticeable scratches or stains on the outside. Regarding the control unit, I have confirmed the sound output from the earphones and the input from an external sound source. The metronome function and all three types of effects are functioning normally. The strap is not the original product, but a substitute. Earphones are not included. There are no noticeable scratches or stains, but there is a feeling of use due to aging. Please understand this beforehand. This is not recommended for those who are sensitive. We will conduct transactions with those who understand used items. Please note that we will not accept any claims or returns after the transaction is completed. Thank you very much. [Product Name] Best Brass Best Brass e-sax Mute for alto saxophone [Product Contents] Main unit Strap Instruction manual *Earphones are not included. Please prepare them separately. *Batteries are not included. Please prepare two AAA batteries. [Size] 304 x 714 (mm) [Weight] 2,310g [Muting function] Approx. -25dB