i am so pleased with my Dugg box and all i use is genesis or rda, and even silica tank mods... all from 1.0 to 1.4 Ohms.
This Dugg dna20 is too simply so efficient; in pass through (13-15w uses up an 18650 quite quickly) when needed; i vape mostly in my office/den where i am like 75% of my day.
talk about smooth power delivery, and a readout of Ohms, volts, watts... superb!
these should be gobbled up immediately. imo