These cameras have a wireless transmitter built-in or attached. Most compact and easy to use. Range up to 1000 ft LOS. You can operate multiple cameras (up to 4) within the area but single channel cameras only allow up to 2.
You can combine a wired camera plus these transmitters to make it wireless camera system. In this way you can achieve best quality picture and range up to 10 miles.
FACTS YOU SHOULD KNOW ABOUT HIDE IT YOURSELF CAMERAS...BEFORE YOU BUY
