Thank you for viewing. I purchased this item new and used it for about 3 hours a day for approximately 4 months. There are signs of use on the transmitter, cables, and main unit. Also, there is a crack on a part of the main unit, so please check the photos. The main unit and accessories have been cleaned and disinfected with an air duster and 77% ethanol, etc. In addition, since the original instruction manual is not included, I will include a simplified bound version made by printing the data from the official website and stapling it. Reset and operation confirmed. Contents: - Neck speaker main unit - Bluetooth transmitter - USB charging adapter - USB charging cable - Transmitter power USB cable - Non-genuine instruction manual - Color: Black - Connection type: Bluetooth - Features: Voice call compatible - Usage: For TV, smartphone - Operation buttons: Volume adjustment, play/pause button