I checked these out. It's a big vat of water and you stick a large probe in it and hook it to the side of the vat. It brings the temperature up to what you want to cook your meat. You place your meat or dish in it (in a plastic bag) and it sits in there and maintains the temperature until it is done. I won one of these in a sweepstakes and sold it on Ebay. I could maybe see a restaurant using one that gets a lot of food in vacuum packed bags maybe but from what I read it takes quite a while to get the food up to temperature. I sold mine for $130. They sell for around $175 new for a name brand one. I just couldn't see myself using it for anything. Cooking a steak in one you still have to take it out of the bag and brown it on the grill. There are you tube videos on these if you'd like to see.
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