Seems like folks are hung up on seeing a 'J' on their screen instead of a 'W'. Not so much here, but reading elsewhere, you'd think the sky is falling. Adjust to your preference and move on. It's not too difficult.
I'm curios to see what its actually doing in there on a power level. I mean the concept of a joule is not that complicated; and, the elect nerd in me loved the ide of a new variable adjustable point in vaping.
But what its actually doing will be the fun part.