Material:cotton Sleep Headphones & Sports Headband 2 in 1- Sports Headband allows you to listen to your music without having to wear additional headphones, and protect you from being disturbed by your mess hair and sweat.Microphone to let you won't miss any callings. Wireless Version-5.0 Technology - Wireless Headband pair with any Bluetooth-enabled smartphone or tablet devices quicker & easier. 45 feet wireless range, rechargeable LiPO battery and with a 2 hour charging time provides up to 10 hours of Playing Music or 12 hours of Talking with a 100 hours standby time. Perfect fit Sports or Sleep. Premium Audio Quality - Thickness is only 0.25 inch speaker, which is very comfortable for sleepers. True HD HIFI sound featuring latest Bluetooth technology that produce great sound quality.