Temp control is what it says. You hit the button and it tops out at the set temperature and holds it steady. It's the ultimate in a regulated vape (more than volts or watts, i.e., power mode). In power mode, I manually regulated my vape by toggling the fire button with each puff until satisfied. In temp control I just push the button once until satisfied. After awhile, you deliver a perfect hit each and every time because the temp is steady (unlike power mode)...one that is fully saturated in the lungs.How does it change the way you vape?