This switch combines the capabilities of a 4-port KVM switch with a 2-Port USB hub, while providing a DVI monitor interface and audio support. Moreover it carries advanced features, such as 120Hz 3D display support, gaming keyboard compatibility and port selection/switching using a mouse, aimed at giving you flexibility, convenience and enjoyment. • 4-Port DVI KVMP Switch with USB 2.0 and 2.1 Surround Sound Audio • 2-Port built in USB 2.0 hub fully compliant with the USB 2.0 specification • Full bass response for high quality 2.1 channel surround sound systems • DVI digital and analog monitor support – fully compliant with the DVI specifications • Superior video quality: 1920 x 1200 @ 60Hz (Single Link); 2560 x 1600 @ 60Hz (Dual Link): Works with cutting edge 120Hz LCD monitors and active shutter glasses to create a 3D environment with maximum resolution of up to 1920 x 1080 for your ideal workspace and entertainment • HDCP compatible • Power on detection – if one of the computers is powered off, the switch will automatically switch to the next powered-on computer • Mac®/Sun® keyboard support and emulation • Firmware upgradable