We registered for the Summer Infant Baby Touch in order to have this capability. I also liked that you could set it up to rotate between the rooms automatically (some require you to manually switch between rooms). Also, it plays audio from both rooms. I can't really give a review because we don't have it yet, but on most websites the reviews are pretty good.
We have the Summer Infant Best View...and love it! (Babies R Us doesn't carry it....only Buy Buy Baby but you can use a 20% off coupon and save some money on it). It pans and zooms and can switch from room to room. Great color screen for day and great night vision (b/w) at night. No sound or conflict issues. My friend had the one mentioned above with the touch screen (larger screen)...difference was that I think the range was a little further (feet-wise) and you can speak back to the baby (which were not a must for me). She ended up returning it and got the one I have...she wasn't crazy about it and not worth the extra money.
I have a Summer Infant Slim and Secure which I think can do 4 cameras? We also looked at the Lorex which could do up to 4 cameras and almost bought it.
I plan on getting the Motorola Video Monitor. link You can use up to 4 cameras and from what I've read, they far exceed the Summer Infant models, including the system just plain lasting longer.
Re: Video Monitor with 2 camera capabilities
BFP #2 7/18/11 - EDD 3/29/12 - Born 3/13/12
BFP #1 4/4/11 - Natural M/C - 7w1d - 4/30/11
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