Smoke alarms can save lives, so every household should be equipped with them. This model from here Smartwares has the particularity that it is a 10-year shelf life (or should be). For the battery is permanently installed and can not be exchanged, ie. after the end of the period the unit should be discarded. Attached it to the ceiling with anchors and screws. Because of the reviews here but I have to decide for the alternative magnetic fastening. Then again press the button for a few seconds and the device is enabled. Periodically, a flashing light is emitted, for sensitive sleepers might that be an obstacle, I personally think it's not so bad. In case smoke is warned with 85 db, even during ongoing television and floors away which is well audible. Conclusion: A solid piece of equipment that keeps hopefully 10 years.
