Nurture your inside garden with this Dirt Genius Seedling Heat Mat. This 48" x 20.5" radiant electric seedling heat mat warms up to a consistent 10-20 degrees above ambient temperature, making it a great tool to efficiently improve root growth and germination time. This Dirt Genius Seedling Heat Mat offers innovative water-resistant construction, an intelligently designed internal heating wire layout, and its plug-and-play simple power up makes this seedling heat mat easy to use.