Sleeping Headphones Has True HD high fidelity sound featuring the latest Bluetooth 5.2 technology that produces great sound quality. Provide a well-closed and immersed environment for your ears, Bluetooth can pair your any Smartphones Tablets easily. Built-in adjustable high-quality speaker and microphone for hands-free and clear call. In addition, sleep headphones can be washable after you take out the Bluetooth module and wires.