What: CheckTemp II Interior/Exterior Temperature Sensors
Why: I wanted an interior / exterior temperature sensor. The CheckTemp II unit was $80, and it was suppose to come with a humidity sensor as well for an extra $10 or so. Well, the humidity sensor was out of stock, so I never did get it. However, the blue color matches the VW blue pretty well, so I kept it.
What I would do differently: I would like a Hi-Res cluster with the built in temp sensors, as well as the other nifty things you can do with it.
Nobody sells these anymore as far as I can tell. If you find them for sale, let me know.