This is a listing for the left earbud only, as the right one was lost after being used twice this summer. It works perfectly fine with just one earbud. It is not bone conduction. It's an ear-hook type, not in-ear, so it's practically unused. It's a popular product with good cost performance and is easy to use. The sound quality is also quite sufficient. Includes a simple instruction manual. Open-design wireless earphones with a digital battery indicator. - Model: R3 - Type: Open Wireless Earphones - Color: White/Gold - Display: Digital Battery Indicator - Package Contents: Includes charging case - Product Specifications: Bluetooth connection