x 234(H) Screen Resolution, Car /Automobile Rear View Mirror Display Monitor Support Two Ways Of Video Output, V1/V2 Selecting (Electronics) Have got to say,the theory benihd these is great,but the one I own(did not buy from Amazon) is the second return,the first one was dead in the water straight out of the box,the second functioned really well for 3 weeks then it seemed to brain fart and stop working so am waiting for the 3rd one ..in fairness I must say several friends have these and have had no problem with them so maybe I just got a raw deal,the 1st did look like an open box'type product and the second looked like FedEx had played football with the package so that likley was a major part of the death rattle of the second,will update after I have had the new one for awhile in the interest of fairness.I like the idea and like the unit the one that worked,the clarity was good and is reasonably well thought out hence the 4 star review.