1 > 4 switch modes: four independent patterns to lock with switches-swing out only, in only, in and out, and fully locked, making it easier to control your pet and pet ;get out ; 2 > Applications: Exterior Dimensions: 23.4 x 24.9 x 2 cm (W x H x D), Interior Dimensions: 19.1 x 20.6 cm (W x H), suitable for installation on doors and thin walls, suitable for cat lighter than 8 kg and waist circumference less than 60 cm 3 > Easy to Install: Full instructions provided, make you easily install in windows, doors, closets, etc. ; 4 > Groomed: Clear pet flap allow see through door. Outer screen is waterproof. Strip brush reduces door closing noise; 5> Quality Guarantee: Made of ABS plastic, weatherproof, the surface is smooth and durable; 4 locking ways: Get in and out (fully locked) Free in and out (fully open) In only Outside only Switches instruction function: 1. Turn red and green switches to two sides, Pet is prevented from entering or promising house. 2. Turn red and green swithes to