From the product description, check product page for current description, price and availability:

• Stable Heating System: Designed to increase the temperature of the rooting area 10℉ to 20℉ above the ambient air temperature, perfect for indoor gardening, for better germination and plant growth
• 5-Layer Structure: The outer layer of this seedling heat mat is made with heavy duty PVC material, and the middle alloy Nikrothal heating wire is wrapped in dual insulating PET layer which is firm, durable and safe for use
• Water-Resistant & Easy To Clean: IP67 water-resistant, proofed against splashes, showers and sprays. Due to the high water-resistant level, it is easy to clean the Ohuhu plant heating pad, just need to rinse and wipe it
• Ideal Size: The size of this Ohuhu seedling heat mat is 10”x 20.75” with 6 ft power cord, suitable for general plant germination and keep a moderate temperature for your plants in cold winter
• Carrying Pouch: Comes with a storage bag, just need to roll up the heating pad and put into the handy carrying bag when not in use, convenient for collection

From HBF: Make sure the components you use are compatible and rated for your intended application.  Contact manufacturer with questions about suitability or a specific application.  Always read and follow manufacturer directions.