Easy to operate: Just insert the cassette adapter into the car's disc player. Then the cassette adapter will connect to your phone. Built-in microphone: The cassette adapter features a built-in microphone that supports calling functionality. LED indicator light: The cassette adapter is equipped with a USB charging LED indicator light, making it convenient to charge. Button controlling design: The cassette adapter includes a manual control button for easy operation. Bluetooth 5.0: The cassette adapter utilizes Bluetooth 5.0 technology for a seamless connection to your smartphone. Type: cassette adapter Colour: black Material: ABS Package Contents: 1 x cassette adapter 1 x USB cable Only the above package contents are included; other products are not part of this offer. Note: Light reflection and different displays may cause the item's color to appear slightly different from the actual product. The measurement allowed error is +/- 1-3cm.