Jeez, this is so complicated! The device ranges from 3 to 6 v. It seems it's limited to 2.5 amps and apparently so does the Provari. I was also told, much to my astonishment, by a veteran in these forums, that standard resistance cartos work perfectly in high voltages. I also heard dual coils worked like a charm in high voltages plenty of times. Regarding the standard resistance ones I also heard the opposite several times. I know many people use HV attys to vape at higher voltages, it's just that drip tipping isn't my cup ot tea really, albeit acceptable. As a total newbie to VV devices such as this, I must say I'm really, really confused (not to mention all the totally different opinions - apparently all from people who seem to know - regarding the best 18650 batteries for the device). Jeez again...