1、For Bluetooth chip that connects to your phone to listen to music, help quick relaxing while sleeping. 2、Comfortable velvet material, more breathable and comfortable wearing experience. 3、Elastic and hook & loop fasteners are suitable for most people, wonderful and practical accessory. 4、Music playing time, 6H for maximum sound, 4 hours for moderate volume, long endurance. 5、Suitable for wearing during noon break, also can be used for night sleeping. Condition: 100% Brand New Item Type: Eye Patch Material: Velvet + Polyester Power Supply: USB charging Battery Capacity: 150mAh Charging Time: About 1-2 hours Size: Approx. 12 x 37 x 1cm / 4.72 x 14.57 x 0.39in Battery Power: 0.55W For Bluetooth Transmission Distance: 10m Earphone Channel: Stereo (2.0) Music Playing Time: 6H maximum sound, 4 hours moderate volume Horn Resistance: 32 ohms Horn Power: 0.02W Frequency Range: 2.4-2.4835GHz Sensitivity: 45dB Transmitting Power: 6dB 1 x Eye Patch 1 x USB Cable 1 x Manual 1 x Storage Bag