Upgraded all metal back for increased durability. Fast results with less noise, 10 second dry time. Power cuts off automatically after 60 seconds of irregular use. 5 Year Warranty. Motor Type: Adjustable Brush Type, Dual Ball Bearings ; Thermal Protection: Motor shuts off at 275°F (135°C), Heater shuts off at 185°F (85°C) ; Operating Airflow: 19,680 LFM ; Air Output Temperature: 131°F (55°C) ; Ambient Temp 77°F (25°C) ; Sound Level: 68.2dB ; Watts: Heater Element 450-700W, Adjustable ; RPM: 12,000 - 18,000, Adjustable ; Voltage & Amps: HD0950-09 - 110/120V / 12.5-13.4A.