This monitor is by far the worst one I have tried! I wished I had read the reviews online before purchasing it. I liked the idea of the two way communication since we have a two story home, but the baby's unit would frequently and all of a sudden make a horrendously loud static sound for no reason. I am glad I tried this monitor out before my baby arrived. I can't imagine having this monitor around with a sleeping infant. It went back to the store and we now have the Sony Babycall 27 channel which works great.