4 Way Interlock: On, Off, On/Off, and Locked positions. Features a cat flap with four locking modesallows outward swing, inward swing, two-way passage, and fully lockedto easily control your pet's access. Convenient for letting pets in and out without constantly opening and closing doors. Perfect Glass Compatibility: Clear design integrates seamlessly into glass windows and doors. Ideal for sliding glass doors, glass windows, and other glass installations. Provides a clean look while allowing clear visibility. Pets will love the modern, user-friendly pet flap. Smooth and Quiet Operation: Dual-panel construction with a door brush strip to reduce noise. Interior rubber seal helps protect pets from injury. Silent closing action prevents startling pets and minimizes disturbance to household members, making it easier for cats to access their litter box. Durable and Weather Resistant: Constructed from strong ABS plastic and UV-resistant 100% polycarbonate for long-lasting performance. Designed to withstand various weather conditions, ensuring reliable use in different environments. Suitable for cats and small dogs.