M-size heated mat for dogs and cats, using AC power to provide a comfortable temperature. They didn't seem to like it much and hardly used it. No box or instruction manual included. Temperature adjustment on both sides. It's soft like a water pillow. It warms up gently and is safe for animals. - Size: M size - Application: Heater mat for dogs and cats - Features: Heating mat for pets - Power supply: AC power Thank you for viewing.