【4-Way Lock】Four Modes (Entry Only, Exit Only, Entry and Exit, Closed) can be easily controlled by the Door Knob. 【Door Body Size ;Pet】 18cm Wide * 19.5cm High, Suitable for Cats with waist circumference less than 55cm pour traverser facilement la Chatière pour Chien. 【Silence & Freedom】 The magnet and non-direct contact Brush can reduce the Noise caused by Pets Entering and Exiting. 【Easy Installation】 Can be installed on the wall / wood / PVC door. The installation diagram in the package shows how to install it easily. 【Quality & Guarantee】 The beautiful and durable ABS Material will not be damaged by the influence of daily use.