I use cartomizers. Right now I have a Drip Tip carto from Ikenvape on it set at 4.7 volt and loving every minute. Before he made his amazing cartomizers I used both KR808D-1 and 510 cartos on it. I like cartomizers better but that's just a personal preference. Allot of people like dripping with atomizers. It's just too much fiddling for me.