Installation without problem. There is a first plastic plate to be fixed against the wall (2 screws, 3 possible distances to choose from), and the rest is clipped in and is locked by other 2 screws. You still have to be careful that the electrical son plugged in does not hinder the closing of the case, which can then caught the direction of the detector. Unlike the product description, there is no sensitivity setting: only the direction of the detector that can play is only a palliative. And unlike the product description yet, detection is far from reaching the 10 meters: only 3 to 4 max for one person. For reliability, the term "click" for ignition, a sign of an electromechanical component, which worries me a bit of time, but we'll see in use, I will update if problem. For the rest, it is nominal, plastic looks solid and the globe is generously proportioned. Given the good price / quality ratio, I would have put 5 stars if the product description had been made without these little cheating a bit annoying.
