This is a set of Sennheiser IE 100 PRO (wired) and a Bluetooth connector for wireless connection. It can be used with the included 3.5mm wired cable, or you can swap it with the wireless connector for Bluetooth wireless connection, just like replacing a cable. I purchased it two years ago and used it for about six months. Both wired and wireless connections have been tested and confirmed to be working. There are no noticeable scratches or stains. I will clean and disinfect it with alcohol before shipping, but please refrain from purchasing if you are sensitive to items that have been in contact with another person's skin. Included items: ・Main unit ・Wired cable ・Wireless connector ・Charging cable ・Ear tips (3 sets) ・Cleaning tool ・Soft carrying case ・Outer box ・Instruction manual Note: The cushion inside the outer box is missing. I will include cushioning material for shipping, but please be aware of this.