The FM Systems CM-1V Camera Master Video Signal Tester is a reliable and versatile tool designed for testing NTSC video signals and CCTV cameras. With 2 BNC loop-through and composite video input connectivity, this tester provides easy and convenient testing options. It is powered by 9v alkaline or Ni-cad batteries, making it ideal for on-the-go testing without the need for constant power sources. Made in the United States, this product ensures quality and accuracy in testing video signals and camera performance.