Hello, sorry for the dumb question i just bought a new Tempest and was just thinking to myself how do you know which version you have. I know there is Sky version which is not the one i bought.
I purchased this one. The All New Tempest Weather System
Thanks
Today the only system sold is the Tempest.
Before that (first iteration) you had 3 parts for a system : Sky + Air + Hub
today : Tempest + Hub
Tempest = Sky + Air
That’s in a few very synthetic lines the answer 
What you have is what is sold today. There are still many thousand Sky’s and Air’s in use but you can’t buy them anymore.
And also you can check your Tempest’s serial number. The ones sold in the past (say) 4-5 months will Most Likely have a serial number of something like ST-0004#### or ST-0005####. There may be some “leftovers” that still have ST-0002#### or ST-0003####. My 3 Tempests all have ST-0001#### for the starting serial number. . .so they are obviously older devices. . .manufactured about 12-14 months ago and my Retired beta pre-production Field Test device is ST-0000#### which was produced 2 years ago.
WF has confirmed that the serial numbers are random, NOT sequential…