4-WAY SWITCHING MODE - - The cat flap can be set via the tab switches on the door to 4 modes: exit only, entry only, entry and exit and fully locked control of entry and exit of your animal. DIMENSIONS AND APPLICATION - - External dimensions: 37 cm x 43 cm x 1.8 cm (W x H x D), Internal dimensions: 31 cm x 37 cm (W x H), suitable for small, medium and large dogs and cats with a waist circumference of less than 97.28cm. AUTOMATIC LOCKING AND LOCKING - - Cat flap with magnetic flap closure, the built-in magnet can keep the door closed automatically when your cat or dog goes out. EASY TO INSTALL - - Complete instructions are included allowing you to easily install it on doors, panels and patios or any other area of the screen etc. EXCELLENT QUALITY - - The frame of our cat door is made of high quality ABS material, the netting thread is made of expensive materials, and it is strong and durable.