That one is a Proschoice Ozone unit we won from Olsen's auction earlier in the year. I'll have to check but I believe its a 2-gram an hour unit. Check with John for pricing. It's kind of a no frills unit, no timer, no rheostat, but it works really well. All our other units are Rainbowaire 2-gram, 4-gram and one 8-gram unit.