These are items that were used as monitors for about a week at most. Some have only been used once or twice, and some are new and unopened. There is no packaging or instruction manual, but all were used in a typical manner. Neckband type, in-ear type, and bone conduction type are available; please see the photos. An MP3 player and two new types of ear tips are also included. The used ear tips will be removed before shipping, so please use the included ones or your own preferred ear tips. Please consider these items as used, and understand the above conditions before purchasing. #WirelessEarphones #WirelessHeadphones #BoneConductionHeadphones #WirelessBoneConductionEarphones #WirelessBoneConduction