The lower the resistance (ohm) in an atomizer, the more power is needed to produce good vapor and flavor. But with low resitance you can get better vapor and flavor then with a traditional atomizer. To use the Atlantis you need a battery\mod capable of firing down to .5 and have 25-30 watt power range. If you are unsure, Aspire sells a sub ohm battery made for the Atlantis. The Atlantis is a very good tank with the correct battery.