Correction. It turns your device into a Variable Wattage device.
Voltage X Resistance = Wattage
Watts are what you're vaping. The volts (Variable Voltage) and the resistance (Ohms of an atty/carto) are just a means to get your desired watts.
The kick lets you set the watts.
My kick is set at 8 watts. So I will get the same heat from my vape if I have a 2ohm carto or a 4 ohm carto.