the digital units I use on some of my coolerbators was from eBay http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=271185626115&ssPageName=ADME:L:OU:US:3160
it only reads out in celsius.. so I had to get used to that lol
When you wire it up be VERY SURE that you only strip about 1/8th of an inch of wire. Once inserting the wire if you can see any copper you need to trim it or risk the electricity arcing and shorting out.. I did it. Had it all wired up and running and shifted the box's position slightly and it arced and shorted.