First of all, let's clarify what Ohms are. An ohm is the measure of electrical resistance of the coil inside an atomizer or tank. It is normally shown using this symbol - Ω. The more wraps a coil has and the thinner said wire is, the higher the resistance and fewer, thicker wraps of wire tend to be a lower resistance. Any atomizer coil with a resistance bellow 1.00 ohms such as (0.50, 0.15, etc.) is a sub ohm coil.

DTL (Drirect To Lung or most commonly known as Sub-Ohm) devices are better used with VG-based E-Liquids, as they are much thicker than PG based liquids, and more intense than MTL. They are also best used with a lower nicotine strength, increasing the flavour production. Direct-To-Lung tanks use thicker e-liquids, like those comprised of 60% VG or higher percentages. This delivers a lower throat hit, as well as an enhanced flavour.

Voltage is the direct current given out by the battery and the wattage is the measure of power distributed to the coil from the battery. Wattage can be changed easily using a variable wattage device. More importantly, Voltage will take all the set power the user has defined in the menu and send all of it through the coil. Variable Wattage on the other hand uses the coil's resistance as a guideline and takes the Ohms into consideration, ensuring too much power is not sent to the coil causing it to fail. VW is used in every single regulated device today as it is the most popular form of adjustment.