Only 25 watts is all that's needed to keep the indoor or outdoor pet warm and comfy even in the coldest of climates. The 9 x 12 size is perfect for rabbits, guinea pigs or ferrets and is ideal for the rehabilitation of wildlife. The internal thermostat is preset to be the perfect temperature. We've cleverly rounded all the edges to take away a chewing surface and even capped the cord entrance and the first 18 in. of the power cord with steel. Holes in the 4 corners of the pad are the perfect anchor points to keep the pad in place. Screws can be used to anchor the pad on wood surfaces or wired in place for wire floored cages. The K&H Small Animal Heated Pad is the perfect warm spot for any small animal. This heated small animal pad has been tested & certified by MET Labs to exceed USA/CA electrical safety standards. Indoor or outdoor use. One year limited warranty. Animal heating pad great for most small animals, including rabbits, ferrets, chinchillas, guinea pigs Thermostatically controlled to automatically respond to temperature changes to warm to your pet's normal body temperature Chew resistant features like steel encased cord, pre-drilled screw holes, rounded edges. This 9 x 12 in. pad is low wattage, using only 25 watts This product has been tested & certified by MET Labs to exceed USA/CA electrical safety standards Note: This product may require up to 2 additional days for order processing prior to shipping