This is the BLACKBOX ACR500DV-T, a digital KVM TX transmitter with a DVI video port. It is a reliable unit that allows you to control multiple computers from a single keyboard, video, and mouse console. Designed by Black Box, a reputable brand in the industry, this KVM switch is a must-have for anyone looking to optimize their workspace. The unit comes in black and is compatible with the BLACKBOX ACR500DV-T model. It is a unit type, and you will receive one in your order. Connectors A include DVI, and it is perfect for use in computer cables and connectors, and computers/tablets & networking.