Instruct: Classify Amazon reviews into positive or negative sentiment
Query: controls are self directed

There are only two heat settings on this hair dryer - Warm and Hot. But you really don't have to choose one or the other - the dryer does it for you. The control sort of drifts back and forth from warm to hot to warm, etc. And there are only two blower speeds - High and Low. The low setting is barely a puff of a breeze and the high setting is enough to blow over a brick building. The dryer is also very heavy.There are MUCH better dryers out there......