My 2 Cents. I am not aware of the product specification. I am a contractor in Houston. What I can tell you is that HIT is not a mainstream product in Houston. It may be in other geographic regions of the country. There may be niche applications for no power applications or solar or etc...
I would also not recommend buying your irrigation supplies from your local nursery. Again, I don't know how big your market is. I am in Houston and would go to an irrigation supply house. You may not have irrigation supply houses in your town.
In Houston the major manufactures that we install are Rainbird and Hunter.
Good Luck