Comment Make it impossible for the burglar to stay (Score 4, Informative) 408
Alarms simply tell you you've been robbed.
A far more effective strategy is to ensure that anyone entering your house uninvited will find it impossible to stay long enough to steal your stuff.
To do this, you want lots of *internal* sirens that run at 120dB+.
If the intruders ears start bleeding as soon as they enter the building, they will retreat at a very hasty pace.
That's how my alarms are configured. They ring me over the cellular network and generate an internal sould level that is intollerably loud (as I have discovered on the two occasions I forgot to disarm the system myself)
If he's going to get your iPad he might as well take some life-long hearing damage with him