For the individual living on their own, it’s important to know when you have a visitor. Unfortunately, most hard-wired doorbells are limited in their compatibility and flexibility. As for the hard of hearing, those doorbells can barely be heard. Recent innovations in wireless doorbells have opened up features like never before. The wireless doorbells below have loud, powerful alerts which offer notification that traditional doorbells do not. Some models include brilliant strobe lights to visually notify and even bed shakers powerful enough to wake the deepest sleeper.