USB VGA extender, max extension distance 70meters over single cat5 cable, support 3 USB device on receiver part. Product Feature:*Use ... on the local unit and support three standard USB ports on receiver*Max support VGA resolution 1920* ... mouse*Support the Windows XP,2000, Linux, support USB protocol*No need drivers, receiver with DC 9V/2A ... °C~+80°C Humidity: 0~95%(non-condensing) USB KVM extender 70m