PetSafe Electronic Pet Door, Large

Customize Your Pet's Access - The Pet Door features programmable selective entry, exit and auto-locking options Peace of Mind - The Pet Door works with the waterproof Electronic Pet Door Key worn on your pet's collar; only the pets wearing the Electronic Pet Door Key can go in and out Multiple Pets - Great for households with multiple pets; programmable for up to 5 Electronic Pet Door Keys Battery Operated - The Pet Door is battery operated (4 D-Cell Batteries, not included) Door Installation - Designed for installation in interior/exterior doors; wall installation option available with purchase of Wall Install Kit Door Includes - Interior frame with flap, exterior frame, operating guide, cutting template, key ring, 8 mounting screws and Electronic Pet Door Key (both located in the battery door) Available in Two Sizes - Small for pets up to 15 lb, Large for pets up to 100 lb