Medium size headband fits most with hat size 6-7/8 to 7-3/8 (21.5 - 23.375 inches) Fall asleep faster, naturally, without drugs Block out ambient noise without painful earplugs Flat headphone speakers are comfortable to wear even laying down or on your side Machine-washable headband is made from
Medium size headband fits most with hat size 6-7/8 to 7-3/8 (21.5 - 23.375 inches) Fall asleep faster, naturally, without drugs Block out ambient noise without painful earplugs Flat headphone speakers are comfortable to wear even laying down or on your side Machine-washable headband is made from recycled materials. Built-in volume control Play/pause Wireless range: 15-30 feet (5-10 meters) Battery life: 5-7 hours Charging time: 2 hours.