ViewHD Advanced HDMI 4x4 True Matrix Switcher for Full HD 1080P & 3D with RS232 Port Full size enterprise grade metal constuction, rack-mountable with mounting kit and screws True HDMI 1.3b version and HDCP compliant to support 3D video at 1080P Multiple Switching modes: 16 button IR remote control, operate manually or operate via RS232 port With IR extender: entend remote control signal range Time delayed keylock feature to disable selection buttons on the unit to protect remote operation