Features1BLUETOOTH 5.2: The latest Bluetooth V5.2 chip, more stable connection, clearer sound quality, more enjoyable wireless experience, HiFi stereo sound, shocking bass effect, clear and stable calls without interruption. 2VOICE PROMPTS: English voice prompts for power on, power off, successful pairing, low battery, maximum volume, etc. Fast and stable transmission rate, non blocking transmission distance of more than 20 meters. 3SOFT AND COMFORTABLE: Made of soft fabric, lightweight and comfortable, fits the facial contour, effectively shades the light to provide a quiet sleeping environment. 4MULTIFUNCTIONAL: Combining Bluetooth headset, eye cover and hair band in one, convenient and practical, not only for sleeping, but also can be used for outdoor sports and traveling. 5ELASTIC DESIGN: Adopting elastic design, suitable for people with different head circumference, ensuring a comfortable fit and not easy to fall off.SpecificationItem Type: Bluetooth HeadbandMaterial: PolyesterBattery Type: Lithium Battery (Shipped with Built in Battery)Battery Capacity: 300mahPower Supply: USB InterfaceTransmission Distance: 20m/21.9ydSound Channel: StereoPackage List1 x Bluetooth Headband1 x Charging Cable1 x User Manual