Built to Last Extra-fortified connection between the super-long power cord and the mat, fixing a common weak point in other heat mats. IPX-4 water resistance means you can scrub the mat clean or wipe up spills without worry. The 3″ x 20″ mat is perfect for small spaces, like countertops and windowsills. Energy efficient design: Only uses 6.5 Watts. Maintain Temperatures in the Sweet-Spot for Growing VIVOSUN’s heat-mat technology hits that sweet spot temperature around 10-20 above ambient air temperature – perfect for seed starting and cutting propagation! After covering with a humidity dome, the mat gets warm enough to create dew throughout the plastic dome, keeping your plants from drying out. Keeps a steady temperature and distributes heat evenly, even in the cold (with an insulating layer underneath). VIVOSUN’s upgraded heating film ensures uniform heating and unbeatable durability.The multi-layer construction gives you complete assurance this heat mat won’t overheat or scorch your delicate roots when left on 24 hours a day. Professional Results Users report near 100% success for germination, cloning and root development. Works perfectly for spring plant starts, in the winter or any time your plants need a heat boost. Also great for brewing kombucha or other DIY fermentation projects – wraps around containers nicely. Recommended for use with a VIVOSUN Thermostat Controller and Humidity Dome for best results (both sold separately).