4 PORT USB HUB
1/Fully compliant with Uninversal Serial Bus Specification version1.1 and USB2.0
2/USB 4 Ports for variety of external USB devices connection demand
3/Driverless,hot plug&play
3/Support for Windows Vista/xp/2000/98SE/Linux2.4 and MacOS 8.5 or over version

STEREO SPEAKER
1/USB Stereo Speakrer Powerd directly by USB or indirectly by DC port (5.0V/1000mA) or battery(4 pcs with current 3A) and suitable the sounds from computer and mp3 and so on
2/internal stereo drive built for internal radio channel using and enjoying music
3/Earphone Audio output connection capability
4/Suitable for CD player mp3 and mp4