I purchased this for work about a year ago and used it once. (It was sold out in the previous post on the sales page, but I am selling two of the same type of product, and only one has been sold.) It is in relatively good condition. The box, instruction manual, case, charging cable, and conversion connector are all included. Please check the photos. ★Instant purchase is welcome. ★I will take measures to prevent water damage and will pack the item carefully. (Quoted from Soundhouse below & for price reference) [Regular Price] ¥34,100 [Specifications] XV-U4 2.4GHz Wireless In-Ear Monitor * When monitoring one type of sound, multiple receivers can be connected to one transmitter. (There is no limit to the number of connections.) □ Features ・Easy setup ・Lightweight and compact design ・Durable metal body receiver ・Simple and stylish ・High cost performance despite its high functionality ・6-channel specification □ Specifications Operating frequency band: 2.4GHz ISM worldwide (2400-2483.5MHz) Frequency response: 20Hz - 20KHz (-3dB) Dynamic range: 107dB Sensitivity: -88dBm Total harmonic distortion: 0.2% RF output power: 10mW E.I.R.P. max Operating temperature: -18℃ to 57℃ *However, it varies depending on the battery specifications. Latency: Less than 5ms Simultaneous use channels: 6 Maximum transmission distance: Approximately 27m (The actual transmission distance varies depending on the environment, such as radio wave reflection, interference, and absorption.) Operating time: Approximately 5 hours (rechargeable lithium battery / charging time approximately 2.5 hours) Contents: Transmitter, receiver, charging cable, conversion connector (XLR male - TS phone male), dedicated soft case, instruction manual *Earphones are not included. Transmitter terminal shape: XLR, mono phone jack (with included conversion connector) [Features] A 2.4GHz wireless in-ear monitor system. The receiver, transmitter, charging cable, conversion connector, and dedicated soft case are packaged. Easy setup, just plug the transmitter into the mixer. Compact size for easy portability.