This 21.5" LED monitor by Northern is an excellent addition to your CCTV surveillance system. With a maximum resolution of 1920x1080 and a response time of 5ms, you can be assured of clear and smooth visuals. The contrast ratio of 2000:1 ensures that the images are crisp and well-defined. This monitor comes with BNC, HDMI, Coaxial BNC, and VGA video inputs, making it easily compatible with a variety of devices. Additionally, the remote control included with the monitor ensures ease of use. The aspect ratio of 16:9 makes it a perfect fit for widescreen viewing. Invest in this LED22R model by Northern for an excellent surveillance experience.