Don't buy this unless you don't mind inaccuracy

[barf]

I wanted a cheap compass, and the thought of it including an altimeter was bonus. This way I didn't have to change settings on my GPS to see which way I was pointed, or what elevation I was at. I still like this little toy, BUT:
-the speedometer reads 1-2mph high
-the altimeter reads 60 to 100 feet low
-the voltmeter fluctuates 0.2 volts from a different gauge I have
-the compass seems accurate but only to 8 points (NNW will read either N or NW)
-the minutes on the clock are correct, but forget trying to keep the hours correct
-the sound icon is "on" but I've never heard anything from it, a red icon appears for overspeed

and I completely ignore the left third of it. I'm not driving a Jeep and would have bought this unit without the inclinometer if they made such a thing.