I would not buy this at all! This product is REALLY bad. The primary thing we don't like: The "zone alarm" (or whatever they call it that supposed to tell you it's out of range) goes off at random. This is really annoying in the middle of the night -- when it seems to go off most. Furthermore, it seems like the smallest thing can cause the alarm to go off. There are times our cat can walk by it and have it go off. It squawks and chirps all the time.
Recommend this product?
To make it worse, when I contact Sony about this, they didn't even bother to respond to my email! Do you really want to buy a product a company doesn't bother to support?