2.
new bluetooth adapter for car, wireless audio receiver portable hands-car kits with aux 3. wireless connectivity: connects to your smartphone or other devices via bluetooth, eliminating the need for cables and making it easy to use.5mm built-in microphone: some models include a built-in microphone for hands-calling, enhancing safety by allowing you to take calls without handling your phone. user-friendly controls: often features simple buttons or controls for play, pause, andphone call functions, making it easy to operate while driving.