NoCharging Design: Simply plug this BT car adapter into your car's integrated card slot and enjoy music streaming and calls without hassle charging or wiring. Advanced Music Technology: Automatically identifies and delivers audio performance from various TF card brands, enhancing your driving experience with sound quality. Enjoy seamless plugandplay convenience. Adjustable Frequency: Convert any car stereo system into a Bluetooth speaker with Blue Tooth Car Adapter. Easily tune to any frequency between 87.5 to 108 MHz for wireless music streaming. Improved Connectivity: Made with advanced Blue Tooth 5.3 technology, this car adapter ensures faster transfer speeds, clearer sound quality, performance and seamless compatibility with mobile phones. Allowing you to enjoy uninterrupted music and calls in car. Use scenarios In a car without builtin Bluetooth, pair your mobile device with the adapter, select a clear FM frequency, and stream music or make hands calls. Use TF card playback by inserting a TF card loaded with music; the device automatically delivers audio through the tuned FM channel for plugandplay listening. Road trips or daily commutes with multiple passengers: switch among different frequencies within 87.5 to 108 MHz to minimize interference and share audio as needed.