There are many things to check on when buying a baby monitor. It is very important that you choose something that work really well. You might find this could be difficult if you have not bought one and could not test an actual monitor. However, what you can do is to check on baby monitor reviews

If available, go into the forums and get response from actual user. If they are already using a model then ask them a few questions on the monitor. How clear was the sound? It would reflect excellent sound quality if the monitor picks up the quietest of sound. Does it take a lot of other noise interference? Sometime, other gadget in the house emits transmissions that were picked up by the monitor. 

   You should get something that has fewer problems on this. How about the baby monitors' other features? Most conventional monitor transmits audio feedbacks. But many modern monitor have video transmitter and also movement detector. If you think you need these functions, then ask actual users on the best baby monitor.