C.A.
L.:
I have 2 children and we have the Sony NTM-910 Baby call 900 MHz/27 channel monitors. It has the different channels that you can put them on if you start to get any interference. Each child has a different channel and they don't interfer with each other. We also have a 900 MHz phone and it doesn't interfere with the monitors. We had another brand when our 1st daughter was born and it had all kinds of interference and after a few weeks bought the Sony. We have had no problems with the Sony. It has a Voice Activation Mode on the monitor that we keep it set on. This way, you only hear something when they make a noise, cough, sneeze, cry. The other mode, we would hear more noise from their room. If we decide to have a 3rd child, we will be getting another one. We bought ours at Babies R Us, but you can find them online. We paid around $49.99 for it, but it was worth the money. I hope this helps. Good luck with trying for baby #2.