Improved Connectivity Experience faster transfer speeds and clearer sound quality with Bluetooth 5.3 technology. Enjoy uninterrupted music and seamless hands calls. Hands Calling Answer or reject calls effortlessly using the builtin microphone and speakerphone. Stay focused on the road while dialing is simplified and conversations remain clear. Advanced Music Technology Automatically identifies and delivers audio from TF cards from various brands, enhancing your driving experience with sound quality. Enjoy plugandplay convenience. Adjustable Frequency Converts any car stereo into a Bluetooth speaker with the Blue Tooth Car Adapter. Easily tune to any frequency between 87.5 and 108 MHz for wireless music streaming. Use scenarios Daily commute in a nonBluetooth car: pair your phone via Bluetooth, select an unused FM frequency, and stream music or take calls through the car speakers without changing the stereo. TF card playback on the go: insert a TF card from any supported brand, and let the adapter recognize it for quality audio playback while you drive. Hands driving: receive and manage calls through the builtin microphone and speakerphone, keeping both hands on the wheel and conversations clear.