WARNING!
Stay away from this one. When I opened the package everything inside was covered with a film of some kind of black dust. The instruction booklet was written by someone with severe language (English) problems. One of a hundred examples: "Avoid children pampering." The instructions would have been humorous if they had been comprehensible. I am reasonably intelligent and mechanically astute but some of the instructions were impenetrable. Activating and deactivating remotely by phone has a serious shortcoming. Dunno about you but I want to leave my answering machine on while I am traveling; the remote activate/deactivate cannot be done unless you leave your answering machine turned off. The instruction booklet tells you this - but the promotional material doesn't. I have to believe that some of these positive reviews here have been written by someone from the company (who might have better spent time writing the instruction booklet).