The Cat Mate Elite Super Selective is the most innovative electronic cat flap on the market. This door is the only Raccoon proof cat flap on the market due to the flaps unique locking style, it also provides a distinct RFID signal with each individual collar tag making it impossible to replicate. While its programmable for up to 8 cats, the LCD screen shows up to 3 cats location inside or out along with timing control features providing the ability to monitor your cats exiting patterns, and also allows you to set time constraints on when your cats has access in or out. This door has the ability to be installed through both walls or doors and comes with 2 RFID collar chips. This door is intended for cats and smaller breeds of dogs.