... flame-proof5.Quiet fanDescriptions*PTC heater with with twin air inlets, PTC heating elements*Box shape breaks traditional tower shape*Fre-filter ... No light,effectively transfer electricy to heat*When reach rated PTC temperature, cut off the power automatically.*When cloth falls down ... protection: both sied cover opened protection and tip-over protection*PTC heating element: 1,500 to 1,800W*Quiet fan, ...