RPS-500 The RPS-500 mobile display cart has a sleek contemporary design for today's videoconferencing needs. The RPS-500 supports a single display up to 80" or dual displays up to 70". The adjustable rack shelf provides 10RU of space and the adjustable height camera shelf allows maximum control to position the camera.The RPS-500 offers custom display mounts for the 55-inch and 70-inch Cisco Webex Board.