OLLGEN 2 in 1 Out 1 PC to 2 Port VGA Switch Selector Box 1x2 Audio Switch SVGA Audio Video LCD TFT Monitor Splitter VGA Switcher Switch Box VGA audio switch with 2x1 high definition, automatically detects the DDC signal of the display device 2 press buttons for easy switching, compact size and lightweight for convenient carrying, easy to use It is suitable for where monitoring different areas of a building is required and switching between multiple inputs is a necessity 2 Port VGA Video + Audio Switch for two PC to share one monitor and speaker system NO External Power Needed, Cables NOT Included