Dia 10" 120V 500W, KEENOVO Circular Silicone Heater Mat, Liquid Holding Mixing Tank Heating Element Pad, w/ Digital Thermostat Controller Rated at about 6.4W/sq.inch, this is a powerful silicone heater pad to heat your tank Integrated with digital thermostat of large capacity for precise temperature control. 3M adhesive backing offers excellent and easy mounting. A simple " plug & play" solution with plug readily fitted, a latest upgrade with no extra cost. Item Location: Shanghai, China