DESC: With the PTC ceramic thermal cut-off you have no need to worry about overheating, even when the unit is accidentally tipped over or covered by a curtain or blanket. The PTC ceramic thermal cut-off automatically shuts the unit off for complete peace of mind. Dual heat flow setting lets you regulate the output of warm air. The adjustable thermostat lets you fine-tune temperature as warm as you want it. And it helps you conserve energy.