... TF Card • Line-in function, work as extra speaker for other digital device, like PC, Mp3, Mp4 player, ... lithium battery, working 10 hours • High quality speaker• Can fix on handlebar when riding bike• ... Car Blackbox), Bluetooth Car Kits, Car FM Transmitters, Mini MP3 Speakers, Digital Photo Frames, MP3/MP4 Players, ... Store (Store No.: 507803). Hot Sale! Mini Sports MP3 Speaker, Built-in FM, 8GB Memory