This cat flap offers an attractive and effective solution for entry control using your cat's implanted microchip or individual I.D. tag. The thoughtful design ensures optimal space utilization and allows your cat stress-free access. Entry is granted via your cat's personal microchip or the Cat Mate I.D. tag, while foreign pets are denied access. The flap is suitable for up to 30 cats and can be easily programmed with simple button presses. The LED display blinks as soon as the microchip or I.D. tag is registered. It is battery-operated; 4 AA batteries (not included) typically last for over 12 months. The casing is suitable for installation depths of up to 85 mm and is ideal for all doors, including metal doors. With the adapter set, it can be easily mounted on walls or glass panes. The transparent flap, preferred by most animals, is made from very durable plastic. It is weatherproof and draft-proof, featuring a brush seal and magnetic closure. Additionally, it has an easy-to-use 4-way rotary lock.