Link http://www.ebay.in/itm/170921843515 Specification Support File Format: MP3/WMA audio formats. Memory: Support up to 16 GB external Micro SD card( Micro SD Not included ) Music Controls: Volume up/down, Previous track, Next track, Play/Pause Connectivity: High speed USB2.0 Function: U-disk storage function. Battery: Built chargeable lithium battery Connectivity: Driver free for windows 2000or above, Mac, Ubuntu Other Sound Features: Stereo Sound Dimension: 28*41*11mm (unit) Headphone Jack: 3.5 mm Audio output Can be used as card reader