Bluetooth 5.0 adapter: Bluetooth 5.0 on the one hand significantly increases the transmission speed of audio data, listening to songs does not hang, but also for lower latency and high sound quality, on the other hand extends the effective transmission range up to 10 m. Meet the demands of life. Hands-free calling and navigation Car Bluetooth adapter built-in microphone, one-click multi-function button to answer/hang up/reject or redial a call Connect the 3.5mm AUX converter from the Bluetooth connector to the car AUX interface and connect the cell phone to the car audio, so you can not only talk, but also listen to dynamic music and support transmitting voice notifications from your existing navigation app. CVC8.0 Noise Cancellation: Our Bluetooth audio receiver adopts CVC8.0 noise cancellation technology and DSP chip which provides both clear listening and authentic voice transmission. to eliminate echo and block annoying background noise (such as wind, traffic or crowds) which can give you a CD-level music experience. Dual connection: The portable Bluetooth receiver can pair with 2 devices at the same time. You can enjoy your music and no longer have to worry about missed calls. After pairing, the car radio automatically reconnects to the last paired Bluetooth devices, provided they are within range. Packing list 2 USB Bluetooth adapter, 2 3.5mm audio cable. 2 x manual