· Immersive HD Stereo Sound: Enjoy high-fidelity audio with MUSICOZY's Bluetooth sleep mask featuring advanced sound technology. Block out ambient noise and indulge in soothing music without tangled wires or uncomfortable earplugs· 3D Ergonomic Design for Ultimate Comfort: Our innovative 3D contour provides deeper eye space, relieving pressure on your eyes and face. Made with premium memory foam and breathable ice silk lining, this mask ensures a cozy fit for side sleepers· Total Light Blocking for Restful Sleep: Designed with a unique nose baffle, this sleep mask effectively blocks out all light, creating an ideal environment for relaxation during travel, meditation, or nighttime use at home· Quick Charge with Long Playtime: The powerful built-in battery charges in just 2 hours, delivering 14+ hours of continuous playback. Enjoy uninterrupted sleep without annoying low-battery alerts· Durable Hard EVA Storage Case Included: Protect your sleep mask and accessories with the robust storage case made from high-density EVA and snowflake fabric. The case features a smooth double zipper and a carabiner clip for easy portability, ensuring your essentials stay organized on the go