Easy to operate: Simply insert the cassette adapter into the car's CD player slot. The adapter connects to your phone via Bluetooth. Built-in microphone: Supports hands-free calling with integrated microphone. LED indicator light: Shows charging status and allows convenient USB charging. Button control design: Equipped with control buttons for manual operation. Bluetooth 5.0: Enables stable wireless connection to your smartphone. Type: Cassette adapter. Color: Black. Material: ABS. Package Contents: 1 x Cassette adapter, 1 x USB cable. Note: Other items not included. Due to lighting and display differences, the actual color may vary slightly from the image. Measurement may vary by +/- 1-3 cm.