Convert your to a Bluetooth player and you can immediately use the 5.0 Bluetooth program. Used for your car or Supports Bluetooth answering/making calls Supports stereo music playback, audio formats: AAC, MP3, , stereo Supports Bluetooth 5.0and backward compatibility: Bluetooth devices such as 4.2, 4, 3.0, 2.1, etc The comes with a built-in lithium battery that can be Note:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Colour:Black Material:ABS Package Contents: 1 x cassette player Only 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.