Originally Posted by
illdoittomorrow
They're tiny cameras made from unused cell phone camera parts inserted into car remote key fobs, sold from China over eBay. Apparently the #3 version, if you can find it, is the best right now.
The #3 is the best standard definition under ten bucks one, but the $40 #11 (h.264 HD version) is by far superior.
For a water resistant one, this would've been my second choice for a camera (review by Techmoan):
http://www.youtube.com/watch?v=tMkfRFkLo28
Plate numbers are pretty clear from a distance on the #11 key fob cam: