Fixing simplissime since provided with a double scotch suitable and effective face (and also a more conventional fastening system). Too bad, once the tape in place, I have no access to arrears 2 buttons: the on / off, and one that allows to settle latency. It is really a design error. Otherwise I think it clarifies pretty well (locally powerful, but of course not far at all). Requires 4 AAA batteries to operate, I hope they will last a while. The Motion Detection me seems very effective. For less than 6 in any case, I think it's really not bad