SureFlap Microchip Cat Door Connect with Hub Bundle - Door Opening: The Microchip Cat Door Flap Opening is 5 5/8" (w) by 4 3/4" (h

This is a replacement for a different model of SureFlap cat door. We have 4 cats, two that are allowed to go outside and two that are not. The door is easily programmed for the cats and installed easily in the door to our garage. The smart hub is a plus, letting us monitor the activities of the outdoor cats. It also tells me when the batteries need replacing. The hub was the easiest smart device to configure that I have ever added to my home. Just walked thru the steps in the app and it was all done in a couple of minutes.

*****UPDATE****I'VE HAD THIS FOR OVER A MONTH NOW. THE APP IS JUNK. THEY UPDATED IT WHILE WE WERE AWAY AND IT LOCKED MY CATS OUTSIDE.SECOND. NOW THE CURFEW MODE DOES NOT WORK. DO NOT. I REPEAT DO NOT BUY THIS UNLESS YOUI ARE WILLING TO LET YOUR PET DIE OUTSIDE IN THE HEAT OR COLD.All of this is plastic junk. I installed the door in wall next to the door.First off, you mount the door with screws from the outside. And screws are not long enough to reach the inside part. Not only that, they did not think about weather at all. I have to add caulking and other items to keep the weather out. So prepare to buy that as well.I needed two extensions each is only 2 inches. These are plastic crap that you need to duct tape together. They do not snap together nor does the lip go all the way around. You also need to seal them, unless you want water to come through and into your wall. And remember this is the tunnel from the outside that your cats will be using.Next, know that the outside trim piece is plastic and does not fit tightly around the plastic extensions. There is 1/8 inch space all the way around. Once again, get ready to caulk and seal or you will have water in your wall/door.Now, lets talk about the App. It sucks. Period. Once you have trained you cat to go through the door it reads the chip, which just a long number. You can change the number to the cat's name, BUT you must fill out ALL the profile data for the cat, including a sub bread. WTF?Next, to set the time zone, you know so you can use the curfew feature, it has EVERY SINGLE TIME ZONE LISTED AND NO WAY TO FIND YOUR CURRENT ONE. You scroll forever, past Madagascar, and still no Pacific time zone, listed. Again. WTF?You can turn off the dumb green cat ears. Trust me, when you see how bright they are, you will turn them off. If not, it's like having a stop light in your living room.Finally, the door is ok, but the cat must almost bump the door before it unlocks.I would not recommend this product. In fact, I wish I could return this and get something else.

I LOVE this cat door. I don’t know what these other reviews are doing but this is a quality and sturdy door. And I’m particular with what I buy. All the things you can do from your smartphone besides being able to track your cat’s comings and goings makes it worth the price you pay. We have a cat that lives in our shed and keeps the rodent population to zero. With this door I can make sure he’s safely locked in at night and it also doesn’t allow strange cats or other wild animals to even enter the shed, keeping my cat safe from unknown "friends." On bad weather days I can even keep him restricted to inside with no outside access. ALL FROM MY PHONE. Love it! And my husband will say it was easy to install and to get it up and operating. One of the best inventions ever made when a cat mom is stressed whether her cats are safely tucked in bed at night or bad weather!!

Overall, this is a very smart product, unlike anything on the market, and works well. It uses your cats existing microchip to determine who is allowed in and out of the house . This also means that raccoons and skunks cannot get in through the cat door. The fact that you can program every cat and see when they come in the door and out of the door is fantastic. You can set the door time to open and close and it will always let a cat back inside who might have accidentally gotten out. You use an app to control the door and it's easy to use and very intuitive. If you stay out late for dinner, then you can set the door to close at an earlier time using the app, so your pets are in safe.However, if you absolutely must keep a cat inside, known to the system to be an indoor only pet, it isn't 100% foolproof. Of course...Nothing in life is! I wanted to keep my kitten inside until he had all his shots, but continue letting the older cat in and out of the house on his own schedule. It worked okay in the beginning, but as the kitten got more and more curious about where the older cat was going, he figured out to wait for the older cat to start coming through the door and then he would squeeze his body underneath the older cat and get through the door!Both cats are indoor outdoor cats now and the door is still working very well. The batteries lasted about four months which I think is okay. There were a lot of complaints about the batteries expiring much sooner than that. I still wish there was another way to power it then batteries but that's okay.Make sure you do the measurements. I used an existing cat door hole but because this door opening is smaller, it's kind of awkward for my larger cat to get in and out easily. He can do it, but because of the size of the door you want to make sure it's not too low to the ground. He weighs 11 pounds and it is a tight fit.And finally, some feedback for the company who makes this....You have an amazing product!! However, you need to simplify your product line and offer all of the features in more of your products. Trying to find the right product, with all of the features I wanted, took me days of reading and I almost didn't buy it because it was so confusing! I understand you want to diversify your market and provide products at multiple price points because it's so darn expensive, but, your current method is just too confusing for the customers. And, please make the doors bigger for larger cats (and STILL include all the tech features). IT'S EXPENSIVE BUT IT'S WORTH IT!