Features: Let your cat pass through each internal door Give your cat to come and go, the freedom, as he or she pleases with this cat flap that has a 4-way locking system Also suitable for small dogs Specifications: Color white Material: Plastic Size M: External Dimensions: Approx. 20 x 19 x 5.5cm/7.9 x 7.5 x 2.2in Inner Dimension:Approx. 16 x 15.7cm/6.3 x 6.2in 4 Ways To Go In And Out Control: 1. door is locked from both sides 2. flap is completely open and cat can come and go at will 3. Cat can just penetrate from the outside, but do not go back 4. Cat can go out but not go back (to other cats also prevents entry) Surgery: 1. Remove red button to the right and blue button to the left door will unlock. Cat can go out and get. 2. Remove red button to the left and blue button to the left, Cat can just enter and not go out. 3. Remove red buttons to the left and blue buttons to the right cat can not enter and go out 4. Remove red button to the right and blue button remove just to the right, remove cat and can not go back. Package List: 1 x 4 Wage cat flap Package List 1Let your cat pass through each internal door. 2Give your cat to come and go, the freedom, as he or she pleases with this cat flap that has a 4-way locking system. 3Also suitable for small dogs. 4The double-flap provides weatherproofing and labor saving fuctions, and a slide-in closing panel adds additional insulation when your pet is not using it. 5This doityourself project easily installs in all types of interior and exterior wall.