THAT AIR WALK

This brand is among the most famous of the market at a reasonable price.
Easy installation on the ceiling by two small screws.
The test, by pressing the small button-seeing, triggers alarm (fairly strident).
Test to do every week, but this button is very small and difficult to maneuver with the handle of a broom (basketball players do not have this problem), resulting in a point less!
Two doubts for this device (as with others):
- Will it trigger well in case of fire? (I prefer not to have to see!)
- Will it really take 10 years as announced by the warranty? (Lithium battery, not replaceable, is planned for 11 years ...)