I just was given a Valentine One from a relative who got a speeding ticket with it...they didn't go into details, so I have no idea what and how it all occured. THey feel it was either dead or not a good unit, so I have driven with it for a week or so, with my Bel Vector 940, also in operation, to compare the two. THe Bel does pick up everything from electric eyes on doors to speed signs and more. The Valentine never goes off.......ever. I have yet to confirm a bogey, so what am I to think? Any suggestions? Is there a real way to confirm this is actually working?