DUAL BEAM INFRA-RED FENCE
It comes brand new in original packaging with mounting brackets. Features include.. weather-proof housings, separate transmitter & receiver units. Up to a 100M range, normally open and closed contacts, fine vertical & horizontal adjustments,analogue output for easy setup, tamper switch.12V-22V DC / 10-16VAC dim W69 X H212 X D76 [IRF]

 The picture shows the the 2 units uncluded, one of the units is shown with it's cover removed.