Hiko9 wrote:

Think regular mechanical mod, but like the Atto and a couple of others, mosfet board in the top. Unlike the others, equip this with PWM to adjust duty cycleSimple adjustment, adjust duty cycle with the top cap or a little ring at the topcompact, rugged, awesome, effectively a VV mod. You could use it like a mechanical, and just coil for flat battery...why not a thing?

Old provari or it's powerful German cousin the Dani tube mod