For your bell to work effectively, you should position it properly. The positioning depends upon certain factors. Like, the height of the home, type of bell etc. However, generally, if you position it 48 inches above the ground, it should work well. This may vary as per your requirements, though. For instance, if you bring a wired bell, the position will also depend upon the power source availability. On the other hand, batter operated models will give you flexibility.