standard 606's have full perimeter protection with interior ultrasonics.
They will cause the alarm to sound if the boot/bonnet/doors are opened or if someone gains entry to the car through the window (ultrasonics)
you can get dual stage shock sensors, which will emit a warn away or trigger the full alarm depending on how hard the shock to the car is.
Dual zone microwave will emit a warn away if someone just gets too close to the car, it will trigger a full alarm if the interior 'bubble' is disturbed