The magnetic head has a brand new 4-channel output. There is an insulating layer on the surface of the magnetic head, which can eliminate the interference noise of the speaker during normal music playback. | Best-in-class sound quality – do you ride in an old-fashioned car with a recorder? Use our travel case with adapter to play your favorite iPod music! Quick and easy design-place the tape player in the car and connect our adapter to any 3.5mm headphone jack to listen to digital music. | Balanced audio – Adjusting the audio between the music player (iPod or smartphone) and car speaker settings ensures clear playback. Retro experience – avoid retrofitting that classic car by transmitting today ’s digital sound from your mobile device via audio tape. | Optional type-c and Iphone extension cable | 24 months replacement If you are not satisfied with our auxiliary cassette adapter, please contact us first. We are a production factory.