1.Listen to music using your iPod, smartphone, or tablet through your car's cassette tape deck. 2.With gold-plated 3.5mm audio jack, compatible with most external audio device, like cassette player, Smartphone, Mp3, Ipod, Iphone. 3.Output high quality, clear sound. Support to adjust the audio on your phone or car speaker setting. 4.Plug-N-Play. No external power, software and driver required. 5.With 3.7 ft cable. Quick and easy to use. Keep audio source and the tape player on appropriate placement.