Eco Friendly and Self Powered- Powered by heat, speed automatically controlled by temperature of the stove top. Newly Designed-with round back, different with the normal stove fans we usually see. Whisper-quiet, started automatically, even made baby sleep well. Economical- No batteries or electricity required. Circulating warm air throughout the room efficiently. Overall Size: 17L*12W*22H(CM). No installation required. Get into use once received. Product description Notes: 1. Please keep the stove fan out of reach of the children and pets when using. 2. Position the stove fan on a smooth flat surface of your stove top, near the side or back of the stovepipe. 3. The stove fan is designed for usage on freestanding stoves with a normal surface temperature of between 185° F - 660° F (85° C - 350° C). Operating above the recommended temperature of 660° F / 350° C may damage the fan and the electricity generating units. 4. Never handle the base of the stove fan, do not set the stove fan