Anyone has this Herpstat?

which model is it ive looked for it in the herpstat webpage and i can find it
a craigslist seller is selling one of this at good price
the seller told me that it is proportional and that it has 3 power outlets
i want to know if this is true and if it is a good tstat i know herpstat is very good stuff i have a herpstat 2
but ive never seen this model

please le t me know if you have it and if you recommend it