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Wireless Cameras come all shapes and sizes and are capable of transmitting to different distances. The transmission range of a Wireless Camera is usually rated by use the Line-of-Sight (LOS). Standard Wireless Video Cameras have a range of about 700 feet LOS. The signal can be transmitted through most solid objects including glass, plastic, wood, fiberglass, and some metals, but the signal is attenuated. So the actual transmission range depends on the number and type of objects you are transmitting through, such as brick walls, concrete walls, trees, etc. An ordinary 700 ft. LOS Covert Camera can typically transmit signal through about 6 interior walls with ranges up to 300 feet and is designed to work comfortably in a building up to 6,000 square foot (home or office).
For outdoor cameras, auto lenses are needed for lighting change.
For indoor cameras, manual lenses are sufficient to handle a more stable lighting condition.
Many cameras included a BLC circuit. This circuit is used to help correct an image with more light behind the subject being viewed. Without backlight compensation, the subject appears dark with little detail. Using backlight compensation will reduce the brightness of the light to allow the subject to appear brighter and bring out the details.