The Super Surfer, Silver Surfer and Da Buddha dry herb vaporizers a much like a stereo. You are in control and with the adjustable dial you can find your sweet spot that works for you. The inhale speed has a big effect on how hot the air is to vaporize the herbs. Once you find your sweet spot you notice where the dial is at relative to a clock. Any digital convection vaporizers are NOT TRUE and are just a reference like the time o