Also known as Regulated Mods, VV (Variable Voltage) or VW (Variable Wattage) Mods.
VV Mods have a regulated output so you will get a constant vape at the output power to you have adjusted to your desire.
Temperature Control mods can limit the power of the output before the juice runs out so you wont get any dry hits when vaping. Vaping using TC can be best for newbies when the technology is applied. But the controls and understanding the technology may seem a little hi-tech. If you are new at vaping, pick one that has automatic Temperature Control.