Features: 1) 4 port USB hub: a) Compliant with universal serial bus specification version 1.1 b) Single chip integrated USB hub controller with embedded proprietary processor c) Supports four bus-powered d) Driverless, hot plug and play e) USB 4 Prot for varieties of external USB devices connection f) Driverless (P&P) for Windows XP, 2000, 98Se, Linux2.4 and Mac OS 8.5 version 2) Mouse pad: a) Black compact panel and smooth movement which is suitable for all kinds of mechanical mouse and optical mouse use b) Flashes blue light or seven colors light around pad c) Dimensions (W x D x H): 248 x 213 x 18mm d) Allows matching outside power of DC 5V/2,000mA