According to the company that makes them, that is indeed usable for drying hair:

http://www.xlerator-hand-dryer.com/ExcelHairDryer/RH76-C.htm...

Given that they also have an almost identical product that is a hand dryer, you can inspect the pages to find the key difference:

http://www.xlerator-hand-dryer.com/ExcelHandDryer/R76-C.html

"For hand dryers, timers are set at 30 seconds and at 3 minutes for hair drying."