I tried it only once: The manual does not provide sufficient guidelines in relation to the positioning of Magneten.Für New: If positioned not 100% lößt the alarm never goes out. It is now screwed the base during mounting, but the real magnetic clipped. The one destroyed then inevitably in Demantage, when you realize that it does not sit quite right. Testing does not exist! In addition, it was not possible to disable the alarm me then! I had to quickly remove everything and then from the rear remove the Baterie. The Gepiepe has übrigenz interested not the neighbors. Result: holes in Fensterrahmenund three days a ringing in the ear. Mechanically but 1A therefore still 2 stars