Just like giving your pets their own house key, this flap door is smart enough to know who’s allowed in and who’s not. It works by picking up on the unique microchip or collar tag on your dog or cat, and only opens to let him in, while staying closed for all other animals. Simply program in your pets’ microchips with just one button―you can store up to 32 pets in the system―and install on any door, window or wall. Perfect for large cats and small dogs, it features multiple modes to control when your furry ones go in and out, including a curfew mode that locks or unlocks automatically at a set time. It’s compatible with all microchips and includes one RFID collar tag to use if your pal isn’t microchipped.