Summer Infant Handheld Monitor

Recently I purchased an LCD monitor Summer Infant: http://www.summerinfant.com/categories_products_view.php?id=19

I found this device may not be as portable as I want and I wanted to know if I purchased an additional unit of pocket, the birth of summer if I would be able to use the same frequency? They have a provision called the complete kit for baby, but because I can not return to me, I was wondering if an entity additional work ??????

Oooh, I'm very interested in this as well. button of my camera broke and I could not turn it off. It gets really hot and I fear it will break quickly.