K&H Pet Products Kitty Sill Cat Window Heated Hanging Bed and Hammock

We incorporated advanced engineering for strength and ease of assembly, with an attractive oval design. Its dual-thermostat heating unit is buried deep within super-soft orthopedic foam and is removable for year-round comfort. The heater is pre-set to keep the sleeping surface 12-15 degrees above ambient room temperature range. No tools are necessary for installation when using the provided hook and loop fasteners. Screws are also included for a more permanent attachment. Indoor use only. MET listed. One year limited warranty.