I have tried plenty of wireless doorbells, but this is the first one that I am completely impressed with. This kit comes with a transmitter, a receiver, a double sided adhesive, screws, anchors, and a user manual. Both the transmitter and the receiver were very easy to install. The receiver simply plugs into the wall, no batteries required. The transmitter does require a battery, but installs easily with a double sided adhesive sticker. Pairing the two devices was very simple. All I had to do was press the volume button and the chime selection at the same time. The receiver made a loud beep sound letting me know the device was paired correctly. Although this doorbell has a wireless range of 500-1000 ft, I plugged the receiver into the wall of my bedroom. This is where we have the most trouble hearing guests at the door. I also adjusted the volume to the highest option so that we could hear the chime throughout the house. I really loved that this doorbell had 52 tune options. My dogs bark too loudly at the regular doorbell chime, so I was able to choose a melody that didn’t seem to bother them. My family and I absolutely love this doorbell! Now we don’t miss any of our guests or the mailman delivering packages!