24 HOURS OF BATTERY LIFE streams all audio via Bluetooth 5 AAC; AcousticSheep LLC is the original and premium brand for state of the art sleep headphones; High quality sound from ultra thin flat speakers sewn; not glued into a soft pad; Soft cords provide flexibility and strength with reinforced joints for durability INVENTED BY A DOCTOR IN 2007 when she wanted to listen to relaxing music but could not find comfortable headphones for sleeping; Her husband soldered while she sewed; From their kitchen table in Erie PA they created the concept of soft headphones in a headband SLEEP DEEPLY AND SOUNDLY by masking snoring or city noises while relaxing to your favorite sleep audio; Listen to ocean waves white noise guided relaxation or audiobooks to fall asleep quickly and naturally FLEECE FOR SOFT and BREEZE FOR COOL The soft and stretchy size medium fits over 80 percent of adults; If unsure choose the smaller size; 95 percent polyester 5 percent spandex SheepCloud custom technical athletic performance fabrics are moisture wicking and machine washable after removing all electronics US CUSTOMER SERVICE The AcousticSheep herd hand assembles SleepPhones headphones in Pennsylvania to help nearly 2 million people sleep better around the world; Contact us directly regarding sizing technical troubleshooting or our manufacturer's limited warranty; Don't settle for imitation Bluetooth headbands for sleeping when you can have the original SleepPhones Wireless sleep headphones are traditional headphones made bed-friendly and cord-free. Ideal for sleep, travel, and leisure time, our ultra-slim, patented soft and comfortable “headphones in a headband” make listening to audio a dream. Unplug and surround yourself in an ultimate sound experience – without disturbing, or being disturbed by, the person next to you. SleepPhones headphones were invented by a family doctor and her husband in 2007 to provide wearable comfort that's literally music to your ears. They continue to run the company and innovate to improve sleep for everyone. Included in the box: SleepPhones Wireless, micro-USB to USB cord. While you can listen to anything you want, AcousticSheep also offers a free iOS and Android Sleep Sounds app and specialized sleep MP3s with binaurals beats for download.