eJiasu Mini Digital USB FM Portable Audio Radio Support MP3 Music Player TF Card/USB Port with LED Screen Display/Flashlight/Radio Antenna/Pendant Groove for PC iPod iPhone Support Play MP3 Format Music or other media content TF Card,U Disk Can play music and use for language study Audio output function Fit for IPOD, MP3, MP4 player, Iphone and other Mobile Phones FM Radio function,FM Frequency Range 87.5-108MHZ Rechargeable Lithium battery 3.7V 800mAh Easy to plug in your iPod, Smartphone, tablet, laptop and other MP3 player or any audio source that uses a standard 3.5 mm jack