I've had it for a few months, the four button model. To the guy who asked...yes it is a color screen. I love the unit, only have problems at my house in my drivewy cause my sons baby monitor interferes with it. I have never had a problem with it in any other location. If you are getting interferance then I wuld check the ground and really sand the ground location good, this will eliminate most of the interferance and static.