I registered for this monitor thinking what could be the difference between this one and the more expensive - as long as you can hear the baby - right. Very wrong - this monitor had so much static it drove my husband and myself crazy. There were nights I had to turn it off to sleep. We tried changing channels, batteries, moving it around - nothing worked. My neighbor had the Sony and after I saw how quiet, the range (reached to my deck from her house accross the street) I went out and purchased it that night. The Sony is great - no problems and I give that 5 stars. I did keep the fisher price as a permanent monitor in several rooms, but found myself carrying the Sony since the static was so annoying on the fisher price AND they seem to have stopped working after about 6 months of use. Don't waste your money or lose any more sleep than you already do with a baby. I gave one star since I liked the dual receivers concept.