Have looked all over the place and finally figure that maybe I'm just blind after all. I want to find a digital VoltMeter that will give me readings between 9 and 16 volts. Got to be able to see actual numbers.....not just an arrow or a light somewhere between 12 and 14V. I'd like to hook it to the battery and get a real reading of what the charging rate is while I'm out on the road. I've been using the reading on my Garmin, but it's really freaking me out with readings that are showing 10.7(at the low end...while idling) to only 12.4 while running at speed. (It's wired thru a Centech fuse block). But I can connect a DC volt meter directly to the battery and it shows 13.8 to 14.1 while on the road (I don't remember what it shows at idle), Can somebody point a finger in the right direction here?