CCTV security system containing everything you'll need to set up total perimeter security on a main building and 1/2 satelite buildings via (Rx - Tx) wire-less transmitters to the main system. i.e if you have a cottage or garage some distance from the main house you would set up everything in the cottage to a main transmitter box that will connect to the main house via a receiver box and on the system without having to lay cables, etc. You will need a monitor! Specs below: