USB Multi-Function Voice-Chat System Pad + 4 Port Hubs. 4 USB port Hub, Speaker, Mic line-in, Speaker out, Media On/off Switch, Microphone, Mouse Pad all-in-one. Specifications & Features : 4 USB port Hub Built-in stereo speaker Built-in Microphone Built-in headset and audio output connector Built-in Microphone connector Microphone On/Off switch Fully compliant with USB 1.1 and compatiable USB 2.0 Red LED indicator USB powered : 5V/500mA Driverless, hot plug & play. Support OS : Win XP, 2000, ME, 98, Linux 2.4 and Mac OS 8.5 or above. Size : 21.8 x 18.8 mm Weight : 278gm USB cable length : 140 cm Audio cable length : 140 cm