Expand your Zone Shield® covert monitoring system with the addition of a faux-Smoke Detector featuring a built-in SleuthGear® Covert Camera. The covert camera is housed in a standard-looking, but not functional, household smoke detector and will blend into any room for discreet surveillance without tipping occupants off to the fact that it"s a hidden camera. The additional covert camera is meant for use with existing Zone Shield QUAD receiver"s that are capable of supporting up to four SleuthGear cameras. The Smoke Detector Covert Camera has a wireless transmission range of up to 700 feet and a picture resolution of 640x480. Note: This product is not a functioning smoke detector and should not be used as an alternative to an actual smoke detector.