SleepPhones? headphones offer lightweight, ultra-thin speakers embedded inside a soft and cozy headband. SleepPhones? headphones receive audio wirelessly from a Bluetooth? transmitter (included) that connects to your TV. The transmitter can plug into a television's audio port with the included RCA cable, or connects with the included USB and 3.5mm speaker cables, to a computer, smartphone, or almost any audio device. Easily pair/sync with smartphones, computers and most other Bluetooth?-compatible devices Wireless range: 15-30 feet (5-10 meters) for easy connectivity Rechargeable battery life: 10-13 hours Charging time: 3 hours USB charger included with purchase Built-in volume and play/pause controls Ultra-low power, safe RF emissions Superior sound quality with eco-friendly, lead free electronics Removable speakers in a hypoallergenic, machine washable fabric headband Pre-shrunk and non-pilling Free sleep sound online downloads and free iPhone? app