The door and gate should not always be open to everyone and everyone. With the window contact, you are on the safe side and informed at all times - whether you have forgotten to close a window or if someone wants to gain access.Energy saving Heating with window contactSmart window contact, smart heating control: If your window sensor is combined with a smart heating thermostat you can turn your heating down as soon as you open a window and save heating costs, and your CO2 balance is greatVentilate properlyA healthy indoor climate with the door and window sensor: Hot flushes and a cooled out apartment are over with the contact sensor, because you will be reminded after a time set by you in the APP that the windows and doors are still openSecurity systemNo one can, but door or window opens: With the window alarm no one can simply enter your home, because as soon as something has happened at the windows and doors, you get a push message on the mobile phone or the siren connected with it s