brickguy221
Smoking Fanatic
I didn't think about it until just now, but to add to what Bear said, if the Vent is on top on left side and door latches on the right side, it is probably a Bluetooth 2.5 model. Also a shield over the controller.
If it's got a "Multilevel" water pan, that should be a good one, and if it's got a bluetooth set-up & the multilevel water pan, it's a Gen #2.5. That's the one I'm using now & I love it even more than my 6 year old Gen #1.
And I don't think there are any Bluetooth Gen #2, as the Bluetooth came out after the Gen #2.
Bear
If the Vent is on the left side and not the top, it is probably a 2.0 model.