Hydroplanet trade; 10"x20" Seedling Heat Mat for Propagation and Cloning Warm Hydroponic Heating Pad (10"x20" with Digital Thermostat Controller) 1x 20x20.75 inches Seeding Heated Mat AC120V,60HZ,45W 1x Heat Mat Thermostat controls Provide constant optimum temperature between 68-108F / 20-42C depending on your specific crop Seedling heat mat for better plant growth and flower seed germination Light, watering and planting information on mat 2 years warranty any issue contact customer service with order ID