One keypad and one beam is needed to make a system.
The Keypad is used to monitor and control the beam(s). Penlite batteries are needed to power the keypad.
The beam system can be connected to (most) current alarm systems -if the current alarm system has an open port. We can add up to 9 beams on a system, all beams do not have to be bought or added at the same time. This can be done over time.
Beams reach an angle of 90 degrees and a distance of 15 m. The sensitivity and height of the beam can be adjusted.
A GSM communicator can be added to the system. This device needs a sim card and communicates with your cellphone enabling you to activate and deactivate your system via cellphone. This also notifies you which of your areas have been triggered, via sms.
The GSM is not compulsary for the system, however, without this you cannot activate or deactivate the system when you are not at home. You can also not receive alarm alerts via sms.