Simple. Heated. Safe. Energy efficient. The Mod Thermo Kitty Shelter is a simple zip together design. The rigid exterior will hold up to any use. The extreme weather design keeps outdoor cats warm down to the lowest temperatures mother nature can throw at it. Half the floor is heated by a K&H Extreme Weather Kitty Pad Petite heated pad so the cat can choose to be on or off the warmth. Use in a barn, shed, porch, garage, under a deck or anywhere extreme temperatures exist. Safety is our priority, we don't just use safety listed parts, we safety certify the entire product and exceed USA/CA electrical safety standards to ensure your pet's wellbeing. One-year limited warranty. You'll notice that the K&H Heated Bed may not feel warm to the touch when your pet is not on the pad. THIS IS NORMAL! K&H products are designed to only warm when your pet is lying in the bed. You can test the pad by placing a large pillow on top. After about 20 minutes, feel under the pillow. It will feel warm, not hot. If you feel warmth, the product is working as designed. Use with 110/120 volt electrical current only.