- High quality material: The PET flap is made of high quality ABS material with a smooth surface, strong and quality assured. - Pet flap size and compatibility: Outer size 19.7 x 19 x 5.3 cm (H x W x D); inner size 15 x 15 cm (H x W). Suitable for pets under 7 kg; recommended waist circumference less than 40 cm. - 4-way lock with easy adjustment: The door offers four switching modes. Adjust using the red and green switches with labels to set in only, out only, both directions, or fully locked. Easy to control access for your pet while keeping other areas secure. - Transparent visibility and quiet operation: Transparent flip cover allows your pet to see through the door. Outer screen is waterproof. Brush strips reduce door-closing noise, helping to keep both pets and owners undisturbed. Use scenarios: - In a mixed pet household, let a cat or small dog access the outdoors or a restricted area without opening the door for everyone. - When you need to limit access at night or during guests, switch to locked or one-way mode to prevent wandering. - Ideal for apartments or homes where controlled entry helps maintain safety and convenience for pets under 7 kg.