I got mine off eBay. It is a Johnson Controls A419ABC-1 which is digital and has a good array of settings you can tweak to your liking. The major thing you should consider with that unit is that you will need to do some cutting and splicing with the wires on the fridge/freezer. It wasn't anything major, and there are decent instructions with the temp controller, but some people will not want to fool with the wiring. If you aren't confident with doing 120VAC electrical work, I would look for one of the models that you simply plug in-line with the fridge/freezer's plug. I know the same Johnson Controls unit is available for more money in a "plug and play" configuration. The one I got was under $60.