Travel Blue’s Wireless audio adapter allows you to use your wireless earphones or TWS earbuds in places that only have a 3.5mm Audio jack like airplanes and TVs. Dual use – either transmit audio wirelessly from a device to your earphones or allows a device to receive audio wirelessly. Up to 5 hour battery time

100% plastic, cable: 100% poly vinyl chloride , plug: 100% copper alloy