4-WAY SWITCHING MODE--- The chatire can be regulated via the tab switches on the door 4 modes: output only, between only, between and exit and fully lock control the between and out of your pet. DIMENSIONS AND APPLICATION --- Outer 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 97.28 cm. AUTOMATIC LOCKING & LOCKING--- Chatire with magnetic flap closure, the intgr magnet can keep the door closed automatically when your cat or dog goes out. EASY INSTALL--- Full 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 chatire is made of high quality ABS matrix, the thread of the net is made of coty matrixes, and it is strong and durable.