... .Built-in Li-battery,Host part can be used as normal MP3 2.18 languages optional 3.Support folder switch 4.Memory ... Car MP3 FM transmitter AD-658 features:Built-in Flash memory,1-4GB optionalBuilt-in Li-battery,Power-off remembranceDetached joint,host part ... external USB drive and MP3 playerMultiple languagesPower supply:12v-24vBuilt-in original Samsung flash chip,high quality and strong,stable car ...