BT-18 5.0 Bluetooth 5.0 Adapter NFC Sensing HD Stereo Sound Receiver Transmitter For Speaker Headset 1. HD lossless sound quality, listening to songs, lag-free stereo sound quality, enjoy excellent lossless streaming sound quality and cinema sound effect. 2. Receive transmit rich dual-mode interface, widely compatible and supports easy receive transmit dual-mode switching for all audio devices 3. The computer and connect speakers allows upgrade Bluetooth headphones to solve the problem that the computer has non-Bluetooth compatible and cannot use Bluetooth compatible. Listen to music more freely and enjoy music 4. Upgrade vintage car audio, easily connect car audio to car's Bluetooth-enabled audio mobile phone and listen to music navigation wirelessly 5. The airframe is not only small and powerful, but the airframe size is smart, and the function is powerful, making you enjoy listening to songs playing games chasing dramas more. 6. Connection range: 15m 7. Frequency response range: 10hz-20khz 8. Signal-to-noise ratio: less than 110dB 9. Product function: receive transmit 2 in 1