nwm MBN001 Nuum Open-Ear Neckband Wireless Ear Speakers - Model Name: MBN001 - Color: Brown - Accessories: Cord Clip USB Cable (USB Type-A to USB Type-C®) Please refer to the web for operating instructions. I haven't used it much. This is an ear-hook type product, and it didn't fit me, so I'm selling it at a bargain price. (※No warranty card included.)