Variable Voltage & Wattage Mods
These are personal vaporizers (PVs) that are Variable Voltage (VV) and/or Variable Voltage & Variable Wattage (VV/VW) in one unit. Most VV's go from 3.0 to 6.0 volts and are incremental in .1v steps. Most VW capabilities go from 5.0 to 15 watts in either .1w or .5w steps. The advantage of veriable wattage is you can find the wattage you are most comfortable with and the unit will intelligently adjust your voltage based on the resistance of the attached atomizer or cartomizer.
(Pictures are for illustration only)
Also contained in this category are the 3 or 4 stage Variable Voltage devices. With these PVs you can change your voltage, generally by clicking five times, from low to medium to high.