The price was reasonable so I was not expecting anything with a huge range. It worked pretty well from a distance and offered enough channel options to allow us to adjust to (which we did not need). Battery life off the charger is fine (when I forgot to plug it back in). Sound/Video Clarity Clear enough to know when the child is crying and when he is just stirring or making noise. Interference Distance is not great. With rooms on the opposite sides of the house, if you did not position it just right you get the alarm sound. As for outside interference, I have noticed very little Durability We don't test this much since it mostly sits on the night stand in our room and the transmitter on the dresser. Portability The clip is really hard to get clipped on to anything.