Stop worrying about having to get up every time your pets want to go out.

Now you can add multiple pets to your PetSafe SmartDoor Pet Door or PetSafe Smart Pet Doorbell. It's lightweight and perfect for any size pet. The key comes in black and uses and RFA-67 battery. This key is highly water resistant and extremely durable.

SmartKey Dimensions:

• 1 ¼ inch tall and 1 inch wide
• Weighs .7 ounces
• Can be attached to your pets existing collar - not more than 3/4 inches wide