This picture shows the extremely popular YALE 6400 alarm system. The interesting point about this alarm is the telecommunicating alarm panel. When the alarm has been activated the panel not only sounds with its 100db internal sounder but it calls up to three previously stored telephone numbers so the homeowner knows 24/7 that their property is secure.<br>You can also using your mobile ring home to set the alarm if you have forgotten to set it.<br>Again it comes initially with two movement sensors and two door contacts and can be expanded with up to 20 sensors/devices
