Vornado VH202 Personal Space Heater, Black Vortex technology distributes heat evenly for small or personal spaces Small footprint is perfect for on or under tabletop/desktop use 2 heat settings and fan-only mode for year-round use. Hertz : 60 HZ. Volts : 120 Advanced safety features including tip-over protection and automatic safety shut-off system for worry-free use Quiet operation and backed by a 3-year limited warranty, kindly refer the user manual given below for troubleshooting steps. Built to meet U.S. voltage requirements. Certified, safety-tested, and warrantied for use only in the U.S.