Enjoy Wireless Streaming Music --- 2-in-1 RX/TX car Bluetooth adapter can be connected to non-Bluetooth car audio systems, home stereos, speakers, wired headphones via the 3.5mm AUX adapter; And equipped with a Bluetooth 5.1 chip for stable connection / fast transmission / wide signal rangeIntelligent Noise Reduction Tech --- Equipped with the latest CVC8.0 noise cancellation and digital signal processor (DSP) technologies, combined with an enhanced microphone to ensure you much brighter bigger sound while callingHands-free Calling and Voice Assistant --- Built-in microphone and an "MFB" button to answer/redial/hang up/reject calls to help you make hands-free calls. Long press the phone logo button in receive mode to summon Siri voice assistant, human-machine conversation, easy to manageLED Backlight --- Elegant ambient light design, blue light gradient soft display even at night can be easily operatedEasy to Use and Widely Compatible --- Simply plug the 3.5mm AUX cable into the adapter, plug it into your device's USB jack, switch to the mode you need (RX/TX) and you're good to go. Great for your old home/car audio system and wired headphones/TV/PC etc