Save money on batteries by powering your SmartDoor pet door with a power adapter. Simply plug one end into an outlet and the other into the SmartDoor and you're good to go. Your pet will be able to come and go as they please, and you won't have to worry about changing batteries. Alternatively, you can set up dual power, where you power your SmartDoor with an adapter and leave the batteries in the door just in case of a power outage. This product is only compatible with the app-enabled SmartDoor Connected Pet Door.