Newcomdigi waterproof Seedling Heat Mat, Warm Hydroponic Heating Pad for Seedling, Cloning, & Germination, 10" x 20.75" Promote the germination of seeds, accelerate the growth of plants, and improve the survival rate of plants. Heat compressing, all-sealed waterproof, cold-resistant and anti-combustion. Warms root area 10-20 degree fahrenheit over ambient temperature to improve germination. Its quality is high with certificates from multiple countries. The length of the Power cord is 1.9m. Dimensions: 10"x 20.75"; Watt: 21W ; Power Cord's Length: 6ft.