White noise 3D Sleep Mask is a product that combines a sleep mask with built-in Bluetooth headphones, designed to block out light, cooling magnetism and provide a way to listen to audio while sleeping. Product Features 3D Ergonomic Design: The mask is designed with 3D ergonomic technology for the eye area, which is intended to block 100% of light and create an absolute dark zone without putting pressure on the eyes. Bluetooth Stereo Sound: The mask uses Bluetooth technology for stable and fast connectivity. It includes built-in, adjustable, ultra-thin stereo speakers and a microphone for hands-free calls. Comfort: It is made with soft, breathable material and a slow-rebound memory sponge for comfort, making it suitable for side sleepers. Battery Life: The rechargeable battery provides more than 10 hours of playtime on a 2-2.5 hour charge. Washable: The fabric mask can be washed by hand after removing the electronic components and wires.