I've had it for probably 6 months now and like it. The first few months were perfect, until I decided to hardwire it. There's power to the detector, but it is now displaying voltage on the screen. For instance, it will usually read (A 14.3) or so, and when it goes off will just show Ka with the bars relative to the distance from the source. This doesn't seem to effect the performance of the detector, I'm just curious why it suddenly went into this mode.