The design of the case provides a serious side to the product. Really small in circumference is higher than similar products. The installation system will install and detach the base easily fixed to the ceiling detector. Side ring, it is clear that it means! The long-life battery supplied is indicated for several years and after registration on the manufacturer's website, there is provided a certificate and especially a battery change warning, but the doc says to test the alarm once a month.
So far, no untimely alert, like other products (cheaper) that I could use and make the grab as unreliable. So I took this model, saying that more expensive place would be a plus. I wait a few months to acquire one more to cover the floor. According to the notice must put one on each floor and if possible in the rooms, such as bedrooms. I'll see by 2015, but it is clear that the product Soublie, especially the ceiling!
