Enjoy wireless audio with this Twelve South AirFly Pro Bluetooth transmitter. Plug into any audio jack to use wireless headphones or earbuds in places that only have a headphone jack, like airplanes and treadmills. With up to 20+ hours of battery, AirFly won’t leave you stranded mid-air. With AirFly Pro, two people can wirelessly enjoy the same audio, making it perfect for travel companions to share the same entertainment seamlessly.