Purchased new in November 2024 and never used. Only the cardboard box has been opened; the main unit is a complete, untouched item, still in its bag. Although it's new, the operation hasn't been confirmed, so I'll consider it as "near new." The following product overview was copied from the sales page. There may be slight specification differences. Yamaha's unique "Brass Resonance Modeling" Brass Resonance Modeling corrects the tone as if you were playing without a mute. It digitally processes the sound captured by the pickup mute, minimizing the tonal changes that occur with regular muted playing. It also adjusts the time difference, volume, and tone that return to you from the instrument's bell, recreating the experience of playing without a mute. ■ Silent Brass System ■ For Euphonium ■ Muting Function: -25db～-35db ■ Built-in Microphone: Electret Condenser Microphone ■ Includes dedicated connection cable, stereo earphones, and instruction manual Pickup Mute PM2X ■ Compatible with Brass Resonance Modeling ■ Pickup Terminal: Mini Phone Jack ■ Built-in Microphone: Electret Condenser Microphone ■ Muting Level: -25～-30dB ■ Material: ABS Resin ■ Size: 210 × 395mm ■ Weight: 750g Personal Studio STX-2 ■ Input/Output Terminals: MUTE IN (PM7X connection) AUX-IN = Mini Stereo Jack Output/Headphones = Mini Stereo Jack ■ Controls: Reverb (Rev1/Rev2), Volume ■ Equipped with Brass Resonance Modeling ■ Power: 2 x AA batteries (Alkaline or Nickel-Metal Hydride batteries: sold separately) ■ External Dimensions: 70 × 20 × 98mm ■ Weight: 69g (without batteries) Will ship in this cardboard box.