... Built-in FM, Lithium Battery 4. Built-in memory: 8GB 5. Line-in Function • Play MP3 WMA music• Flash Built-in ... Mp4 player, etc. • FM function (Optional)• Built-in lithium battery, working 10 hours • High quality speaker• ... , Car DVRs (Car Blackbox), Bluetooth Car Kits, Car FM Transmitters, Mini MP3 Speakers, Digital Photo Frames, ... No.: 507803). Hot Sale! Mini Sports MP3 Speaker, Built-in FM, 8GB Memory