Product DescriptionSize: As shownMaterial: aluminiumNoise: 25dBSpeed: 1100 rpmStart temperature: 140 F to 60 CWorking temperature range: 140 F, 60 C, 662 F, 350 CBlades number: 5Package includes: 1*5 bladesFeatures:This oven fan is operated by converting heat into energy without using battery or electricity.The working temperature range is approximately: 140 F to 60 C to 662 F to 350 C, higher the temperature, faster it starts to rotate.Can circulate heat through the ro om.This stove fan is quiet and quiet.Attention: The temperature cannot be higher than 662F when using the oven fan.Note:Please allow 1-3cm error due to manual measurement and make sure you don't mind before ordering.Please understand that colors chromatic aberration may exist as the different placement of images.