Wireless 5.4 adapter, Reception/transmission 2 in 1: Send and receive 1 to 2, 10m transmission, Multi audio decoding. High performance BT 5.4 chip, Farewell delay is more stable: Stable and faster signal transmission, rejecting delay and lag. Reception/transmission mode, One click switching: Wireless receiver/transmitter dual-use, mode can be switched freely, suitable for multiple devices. RX Mode, Become a wireless speaker: Mobile phone wirelessly plays music to old-fashioned speakers. TX Mode Transform into wireless television: TV wireless connection with Bt earphones, easy to watch TV shows without disturbing people Smart 1 to 2, Share more fun: Both transmitting and receiving devices can be connected. High gain antenna, 10 m long distance transmission: Antennas to improve the signal sensitivity, at any time to enjoy high strength and stability of transmission. Built in battery with long battery life: Built in large capacity rechargeable lithium battery, TYPE-C socket power supply supports working while charging. Colour:Black Material:ABS Package Contents: 1 * Aircraft audio adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.