This is a set of the YAMAHA wind MIDI controller WX11 & wind tone generator WT11. The mouthpiece has indentations from teeth, and there are stains on the top panel of the WT11. Other than that, there are no noticeable scratches or stains. The mouthpiece patch has been replaced with a new, unused one. The operation has been confirmed by connecting it to a guitar amplifier and actually producing sound, and there are no problems. Also, there are no deformations or malfunctions in any of the keys or levers of the MIDI controller MX11. The set contents are all shown in the overall photo. ＜Set Contents＞ Wind Tone Generator (WT11) Wind MIDI Controller (WX11) Dedicated cable to connect WT11 and WX11 MIDI cable AC adapter (PA-1505) Strap (attached) Yamaha Mouthpiece Patch: 1 (unused, replaced) Instruction Manual (WM11) Instruction Manual (WT11) Quick Start Guide WX11 dedicated case Please feel free to ask any questions. This item is a used product. Please check the description and photos carefully and understand before making a purchase. Please contact me within 24 hours of purchase, and make payment within 3 days. Shipping is planned via Yu-Pack. Thank you for your consideration.