"A closed-circuit television (CCTV) system uses a stand-mounted or hand-held video camera to project a magnified image onto a video monitor or a television (TV) screen" A CCTV includes the following basic features:
video camera with zoo
m lens (hand-held or stand)
monitor or television (attached camera or external)
provide enlarged image of material under camera
magnification range of 2X to 60X+
switchable polarity (black text/white background or white text/black background)
controls for focus, magnification, brightness, contrast
