1. MP3 function 2. FM function 3. MP3+FM MP3 Bluetooth and FM Function Sunglasses : TH868 *MP3+Bluetooth+FM, 3 in 1 function.* Color of Lens: Colorful lens, Polarized ... in battery can support 5-10 hours playing* Digital mp3 player support MP3,WMA,WMV,ASF,MTVOB,MPG,3GP and other music format ... Exporting Carton* Flash price is depend on the order date. FM Sunglass MP3 player