I use a tablet for gps, need to get a pic of it in the ram mount. just realized I could use the dongle and do gauges too and any vehicle i'm using it in....hmmmmmm but probably not, lifters are noisy = oil is a problem, cloud of sweet steam = she's hot, dim lights or starts back firing = alt is out. even with gauges not doing much until those points are reached anyway. But for diagnostics it would be awesome. Can't do diagnostics with even the best race gauges, they just aren't that accurate or consistent. case in point anyone have an Autometer volt gauge? ever notice starts the day with 15 volts, 2 hours later at 13-1/2, 2 hours after that 12 and 2 hours after that 11? get out the trusty mulitmeter or dongle and phone/tablet and its sitting at 13.5 all day. Lots of good alternators changed do to junk "great" gauges.