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 life's demands. Hands-free calling and navigationCar Bluetooth adapter built-in microphone, one-click multi-function button to answer or hang up or reject or redial a call Connect 3.5 AUX converter mm from the Bluetooth connector to the car AUX interface and connect the mobile phone to the car audio, so that you can not only talk, but also listen to dynamic music and support transmitting voice notifications to 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 Bluetooth receiver portable can be paired 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 stereo will automatically reconnect to the last paired Bluetooth devices, provided they are within range. Packing List 1 x USB Bluetooth adapter, 1 x 3.5mm audio cable . 1 x manual