Kidde is a brand known for its reliability. Immediately asked, I tested it by blowing on the smoke of my pipe that triggered the alarm (on this model, the alarm does not stop, wait there is more gas without combustion the analysis cell). But I reassure smokers, you really blow the smoke in the unit, you may continue to smoke near the siren without fear (or else this is that the atmosphere is cut with a knife!). It is recommended that at least one detector per floor. Finally, I paid for the item on Amazon about 20% cheaper than the DIY market.
