1. mouse pad with numeric keypad 2. 3 USB port HUB 3. numeric keyboard for Laptop or Desktop numeric keyboard for Laptop or Desktop3 USB port HUBmouse pad with numeric keypad 1. support OS: Win95 osR2/98SE/Me/2000/XP/VISTA,Linux2.4and Mac os8.5 etc.2. transmission speed: 480Mbps,12Mbps,1.5Mbps3. Power: USB 5V/500mA4. Color: Black5. Unit size:320*215*31MM6. N.W./G.W.: 490.2g/pcs, 611.8g/pc