The DotMod Dotaio is in sence a pod system, and you could say a tank also! (you can make your own mind up on that one).
It's also a bit like a billet box, doesn't have a screen or up/down buttons, but it does have a removable pod/tank, single 18650 battery, and you can customize it, if you look around the internet.
Very easy to use, you do have a power adjust button, fixed power, 4 levels. I've tried it with both the provided stock coils, not too bad, I opted to buy the Atmizoo rba, better deck & flavour, much easier to build & wick, in my opinion, it does cost quite a bit but worth it, still putting this great little box through it's paces but all in all I'm pretty stoked with it. Next thing to find will be some different panels.
Superb service again Vaping 101, cheers.