Solar Drive Way Alert 2 beam

Solar beam drive way alert. Consists of 2 pair or of solar beams that can be upto 100m apart and a reciever that can recieve upto 1klm with line of sight from beams. The  pair of beams are already programmed into the reciever for easy setup. Upto 4 sets of beams can be added to the reciever all giving different sound or tone to make an alert for which beams are broken.