Hi, Tom, we're working on the website. I've updated the cooking temperature range. 200-450 is the current setpoint temperature range. SMOKE mode swings temperatures from 170 - 190 to create the most smoke and GRILL mode will feed fuel continuously to keep the grill as hot as possible, generally topping out at around 600 degrees. The grill is governed at 600 degrees so once the thermocouple (assuming it's in its default position) reads an ambient temperature of 600 degrees, the Pellet Boss will start to back off long enough for it to not exceed 600 degrees. If the FlameZone covers are off, the temperature at the grate level will be higher than 600 degrees. If you move the roaming thermocouple to the grate level, the temperature at the grate level should remain very close to 600 degrees.