It has been opened, but never used. For action cameras Necklace-style (neck-hanging) mount You can hang it around your neck for POV (point-of-view) shooting, freeing up your hands, making it convenient for walks, travel, outdoor activities, etc. Although unused, please understand that there may be very slight scratches due to storage as there is no outer box. Set contents • Neck mount body (logo: TELESIN) • Adapter • Screws ※ No outer box or instruction manual Regarding compatible models This type is compatible with common mount standards for action cameras such as GoPro and Osmo. Please check the shape of the adapter in the photos to confirm compatibility with your model.