We had to buy a second monitor for our second child. We have a Sony NTM-910 for our oldest (3yrs old) which is AWESOME-- great range, very long battery life, great sound pick up across the room. But we have a cell tower next to the house we just moved into. It causes a clicking type interference. So we got the digital graco (to avoid the clicking). This monitor is HORRIBLE. The battery lasted about 5 months before it wouldn't hold a charge longer than an hour. Even when the transmitter is close to her crib the sound is bad. It sounds like she is in a tunnel.I would NOT recommend this monitor for anyone-- get the SONY. If you have interference, THEN get a different one.