It's a small tool that can install on your interior doors, such as bedroom, bathroom and living room. This pet door can provide a handle for you pets, which can allow them to open the door by themselves, and close the door by the tool itself. 1. Please make sure there is enough space between the door and the wall so that the pet has enough room for entry and exit. 2 Install the pet door in an appropriate position according to the height of the pet, and the short side should face the door. 3. The pet door is removable and hook-and-loop fasteners can be installed, making it easy to clean and lock the door. 4. Please install a ring on both the door and the door frame. The recommended distance is one meter. Users can also choose the distance and height according to their own needs. To tighten the ring, it is recommended to use it after 24 hours 5. The tightness of the elastic rope can be adjusted according to your requirements. Specifications: Material: plastic Color: picture color Size: 25cm/9.84"*14cm/5.51"*/5.51" Package Included:1pc * pets automotive door opener 【PRIVATE ACCESS FOR YOUR PET】: No more having to get up and open the door yourself to let pet enter in or leave the room. 【MUTIL USING AREA】: Suitable for bedroom, bathroom and other places with doors, pets can open the door by themselves, they won't interrupt your sweet dream. 【DIY INSTALLATION】: Easily install it at proper position on door based on pet height, won' t damage door or wall. 【AFFORDABLE VALUE】: Made of quality plastic material, sturdy and long-lasting. 【WARNING】: Do not Over Pulled the elastic thread, adjust it to a right tension in order to not break it.