Posted by a reviewer on Amazon

Watch the on line video tutorials and read the supplied booklet several times before attempting to install

Posted by a reviewer on Amazon

On the back of each contact is a zone number using a marker pen copy this number on to the front or side of the contact because once you apply the double sided tape you can not see the number

Posted by a reviewer on Amazon

It is also helpful to write the number and the contacts location on a card for future reference

Posted by a reviewer on Amazon

It comes in handy if the alarm is activated the display will tell what zone has triggered the alarm

Posted by a reviewer on Amazon

For other types of frames such as wooden there are screw holes on the magnetic side of the contact for this

Posted by a reviewer on Amazon

Two of my contacts initially refused to work so i removed the back and cleaned the battery contacts this got them going

Posted by a reviewer on Amazon

Just plug it in to the main unit it is ear shattering so leave it unplugged until all testing is complete

Posted by a reviewer on Amazon

Dont expect this to wake the neighbours because it wont although very loud at point of installation out side of the premises it is dificult to hear