I bought 3 of the smoke detectors. In the beginning was still to the assumption that it is only the supplied batteries. Unfortunately, this has not been confirmed even after 3 months. Several sets of batteries and frequent shifting of the detector have brought nothing but holes in the walls. Those things buzzing all day and all night and are thus simply times completely useless. If I have to take the battery out of the smoke alarm, so I can sleep through the night .... The bottom line is quite simple - Do not Buy: SCRAP !!! I can not say anything about the reporting behavior of my previous IKEA smoke detector, since it has not yet been fired at me. But at least he let me sleep at night !!!!
