Someone else mentioned the problem we have with it -- it has to be on 24/7, and it's very, very bright to have in a bedroom at night. The date/clock function has to be running, or else the CID system doesn't work. What would make this perfect is to have a "sleep mode" to turn off the clock and only have it wake up when there's an incoming call.I bought this for my father for Christmas, because he has trouble seeing the small CID displays, but less than a week later he's unplugged it because the display won't shut off. Too bad he already threw the box out, or I'd return it.