The days of passing around a cable to share content on a big screen in a meeting are gone. The " Techconnect Select" is an HDMI dongle which fits to an HDMI cable, & plugs into your laptop. When a user is ready to share their screen they just press the SELECT button on the dongle. The " Techconnect Select" sends a control signal back down the HDMI cable to the HDMI switcher which is hidden out of sight.