... Touch screen: 9 inch resistive touch screen available, can recognize up, down, left, right side "swipe"; support two- point ... security systems Easy installation and convenient operation, with innovative functions9 '' quad monitor with built-in DVR (MO-141)LCD Dimension: 9 inchesSystem ... 800 x 3(RGB) x 480Brightness: 400cd/m²Viewing angle: up: 50°, down: 70°, left: 70°, right: 70°Operating temperature ...