... 3. Line-in function 4. As extra speaker for laptop Key Features:• Play Mp3 WMA music• Flash ... TF Card • Line-in function, work as extra speaker for other digital device, like PC, Mp3, Mp4 player, etc ... included• Built-in lithium battery, working 10 hours • High quality speaker: 1.5W X 2 • Can fix on ... our AliExpress Store (Store No.: 507803). Mini Sports MP3 Speaker with built-in FM, 8GB built-in flash ...