The Honeywell DC311NP2 is a wireless doorbell with doorknob. Place the doorknob wirelessly (so with batteries) at the front door and plug the receiver into the wall socket. The receiver and doorknob are directly connected when they come out of the packaging. So it is only a matter of places and your new doorbell works. The range between the 2 elements is a maximum of 150 meters. So keep this in mind when placing the receiver. The receiver has 4 different melodies and a maximum sound level of 80 decibels. Hard enough to hear the doorbell at any place in the house.