Has anyone tried a Herrington Catalog product which is a compass/temp thingie that uses either a longlife lithium battery, or can be plugged into an AC/DC outlet? I'd really love the mirror from Mito but refuse to pay $249. plus $144.00 installation (quoted by my dealer on the install.) Are there any others I'm overlooking? The Brookstone $60.00 thing was a bad instrument: you had to punch it all the time, and it was hard to read.