We usually fit these on your front door, or your main entry/exit door. If you have a porch we would usually install this on the main front door to your house. If you would like to use multiple entry/exit routes then you will need one of these for each door.
We would recommend that you have a door/window contact fitted on any external doors that you want to enter or exit via when setting or unsetting the alarm system as this triggers the entry/exit timer.
Please be aware that we have some scheduled work being undertaken at our offices on Wednesday 19th February which will result in our phone lines being down for a while between 10am and 12pm. Please bear with us if you cannot reach us between these times and be sure to call back after 12am when we will be back to our normal levels of 1st class service, Thanks Team MES