We bought this product a couple of weeks ago and had it for about 3 days before it drove us mad, and we returned it. It just didn't seem to work. For example, we charged it up as per the instructions, but it somehow turned itself off during the night, even when it was still connected to the mains. So there we were, thinking our little lad had had a good night sleep (as we hadn't heard him), but he could have been crying his eyes out, for all we knew. Even when it was off the mains, and using the so-called 'rechargeable batteries', they lasted for about 10 minutes before it started flashing and then again, turned itself off.
All in all, not impressed which is a shame as we had had a Tomy monitor before. Instead, we purchased the BT 150 monitor, which has been absolutely fantastic!