Product works well, very easy to use. The disadvantage is that if your hearing is good you will hear a constant high tone from the electronics. I have it in the living room in an open cupboard, (only good place in my situation) my girlfriend does not hear the high tone but it can be heard with me. So if you want to use it in the bedroom or living room and your hearing is still good, I'll think about it for a while. I'm going to ask cool blue if I can exchange it for another brand, if not I'll buy another brand. So once you've heard it, it's irritating.