12 In 1 Design: The Bluetooth transceiver combines receiving and transmitting functions in one device, using the latest Bluetooth version 5.3 to provide a more stable and faster connection. 2Sound Transmitting: Switch on the TX side, you can transmit the sound from TV to Bluetooth headset; you can also send the sound from the player to Bluetooth speaker, enjoy the music. 3Sound Receiving: Switch on the RX side, you can send the sound from your cell phone or tablet PC to the sound device to share with your friends. 4Two In One Button: Minimalist design Bluetooth 5.3 transceiver, volume up down and song switch function two in one, double click the volume button to quickly realize the song switch. 5Support Memory Card: The Bluetooth adapter supports up to 16GB Memory Card, you can play the music stored in the Memory Card and use it as an MP3 player to enjoy your favorite music at any time. 1 xBT Transceiver 1 x Data Cable 1 x Sound Cable 1 x User Manual