I highly recommend the entire K&H Manufacturing line of heated pads, replacement pads, indoor outdoor pads, the lot. We do wildlife rescue, along with fostering critical care, neonates, and special needs animals, we have used these constantly for well over a decade now. They are practically indestructible, under normal conditions, but even a heavy chewer will kill these, if you allow it. I have used these, literally for years, non stop, 24/7. Love that they are super low energy use, DO NOT TURN OFF, and are incredibly versatile; we have yet to have a single one fail, at last count, we currently own 14 of this particular style of replacement bed heater. We are owned by 11 dogs and a cat, all of whom seek warmth, even when it is 30+ degrees out, still preferring to be under the polar fleece blankets. Despite the multiple, different (now) heated dog beds, the favorite one is our old futon couch we converted into one giant, communal pet bed! Put on a fitted sheet, then a thick polar fleece blanket, use rope to ensure it stays in place (when folded into couch) down the central crease. Place these heating pads between the fitted sheet and the polar fleece, along the "seat" of the couch, cover with the polar fleece blanket, and tuck it in on the sides, bottom and top. If you have MY dogs, you will then need to add a second polar fleece blanket or two on top so they can burrow in, and be covered on all sides. Or I guess you could use it as intended to replace a failed unit or turn any pet bed into a heated one....either way, I have used these in multiple ways (strapped to my office chair or recliner...), for years, and not had one fail me yet. The heat never varies, no cycling on/off, no more hot/warm/cool, no waking up to that insufferable auto shut off, nope, none of that. Just put in place, plug it in, and warm, gentle heat.... I highly recommend the entire K&H Manufacturing line of heated pads, replacement pads, indoor outdoor pads, the lot. You may pay more up front (and YES, I have tried less expensive alternatives, all of which died within a year), but this is an electrical appliance that will stay plugged in, for years, permanently turned on and used by your pet. It is not worth having one fail at a critical time or worse yet, have an electrical fault that could cause serious harm to all; spend the money, get a reliable, trustworthy product that will operate hassle free for years, if not decades (many of mine are older than 10 years). HIGHLY RECOMMEND if you are looking for a "heating pad" that is safe, inexpensive to operate, runs 24/7 and is completely reliable.