This stove fan is the best choice for getting the warm air to be dispersed throughout your living space! Our upgraded 4 stove fan is functional,it has a thermoelectric module which acts as a small generator to power the fan's motor.Then it would circulate the warm air directly into your living space. Effective and Economical! Come with a micro USB cord. SpecificationColour:Black Weight:0.52KG Height:220mm Overall Size:220x155x90mm Starting temperature:65 degrees Celsius Working temperature:65-350 degrees Celsius Voltage input: 5V; voltage output: 3V Air flow:110-130CFM Recommendation: 1.It's highly recommended that you use a suitable high temperature thermometer to test the temperature of you stove. 2.The stove fan will get extremely hot during operation. Do not touch any part of the fan while it is operating. 3.A stove glove should be used when repositioning the fan with the carry handle. 4.Please make sure that the fan has completely cooled down before being placed on an unprotected surface. 5.Children must be supervised when the stove fan is operating.