Not leaving the window on "tilt" for hours minimises the risk of attracting the burglers. This is taken care of by the locking mechanism of WINFLIP & can be considered as prevention. After the window is closed manually or automatically the contacts in the WINFLIP‐locking become active & trigger a shrill alarm when there is a burglary attempt. The system is thus self-activating. The alarm electronics remains hidden in the window seam. This is not only a visual advantage, but instead is also effective in frightening away the burglers owing to the ideal sound propagation. You do not neet to activate the alarm system & as such cannot generate any false alarms. Through switching-on via the contacts in the locking WINFLIP alarm does not need any rest current. In this way the battery set has a very long life (> 5 years) WINFLIP alarm is naturally active even when the window is completely closed (grip below) & protects your home also during your holidays. The system proves to be especially effective in the daily use through the combination of automatic locking & automatic sharp alarm system.