They look like this:
http://www.klockit.com/zoom_img/16984.jpg
Different model:
http://www.acurite.com/media/catalog...a2-800x800.jpg
I don't think they have it on their website, but they are definitely in store.
The key element is the probe.
The unit measures the cool side and the probe can measure the hot side of your enclosure. And the humidity gauge is a plus.