K&H Pet Products Thermo-Snuggle Cup Bomber 14 X 18 Indoor Heated Cat Bed’s soft fleece and walls will surround any pet with snuggle comfort and security. Great for animals who love to nest while they sleep. Removable 4 watt heater adds warmth to take the chill off on cold days. Electric cat bed is thermostatically controlled to automatically warm the surface of the bed to your pet's normal body temperature only when your pet is in the bed. Cat bed is machine washable for easy care. This heated cat bed has been tested & certified by MET Labs and exceeds USA/CA electrical safety standards; K&H doesn't just use safety listed parts, we safety certify the entire product. For indoor household use with 110/120 volt electrical current only. Suitable for most larger cats.