Easy to operate: Just put the cassette adapter into the car disc player. Then the cassette adapter starts to on your phone .<br> Built-in microphone: The cassette adapter with built-in microphone can support calling function.<br> LED indicator light: The cassette adapter with USB charging LED indicator light is convenient to charge it.<br> Button controlling design: The cassette adapter with controlling button can be controlled manually.<br> Bluetooth 5.0: The cassette adapter with Bluetooth 5.0 technology can on your smart phone by Bluetooth connection conveniently.<br> Type: cassette adapter<br> Colour:black<br> Material:ABS<br> Package Contents:<br> 1 x cassette adapter<br> 1 x USB cable<br> Only the above package content, other products are not included.<br> Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.