The 4x4 Matrix RMT Remote control lets you control your Gefen Matrix Switcher from up to 1000 feet away. A length of CAT5 or CAT6 network cable extends from the Matrix unit to the remotely located 4x4 Matrix RMT Remote Control. Three methods may be used to control the Matrix unit from the remote location: IR Control, RS-232 Control, and Push-Button Control.