Review on Bell Automotive Digital Compass with Mirror Mount - 22-1-29001-8 by Nathan Vaughn

Wish I'd read the accuracy ratings before buying - Installed for a day, returned promptly. The only readings I can get from the compass are quick readings alternating between East and Northeast, even when I'm obviously going due south. Also, the backlight only stays on for about 3 seconds. If I get lost and try to orient myself, read street signs, turn the other way, etc. I'll probably need the compass for more than 3 seconds - trying to hold down the button to turn on the backlight doesn't help. I was really excited about this inexpensive option for a digital compass as my car didn't have one, but it doesn't. :( Don't waste your time and money - not reliable at all!