Easy to operate: Just put the cassette adapter into the car compact disc player. Then the cassette adapter starts to on your phone .Built-in microphone: The cassette adapter with built-in microphone can support calling function.LED indicator light: The cassette adapter with USB charging LED indicator light is convenient to charge it.Button controlling design: The cassette adapter with controlling button can be easily controlled manually.Bluetooth 5.0: The cassette adapter with Bluetooth 5.0 technology can on your smart phone by Bluetooth connection conveniently.Type: cassette adapterColour:blackMaterial:ABSPackage Contents:1 x cassette adapter1 x USB cableOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.