Yeah I think it is pretty slick also. :) As for your calibration question I have never actually calibrated one. I have never found myself working on anything that requires ultra-precision either so the need to do so has never really occurred. I guess that if you wanted to check for accuracy you could plug in an AC to DC adapter that has the voltage listed on it and check the meter for accuracy that way. You could do the same for checking the amperage. Just an idea.