PetSafe 4-Way Locking Microchip Entry Cat Door, White

Before buying this Microchip Entry Cat Door my two cats were able to get in and out freely using a flap type door. Unfortunately it was also easy for stray cats, dogs and the occasional raccoon to come inside the house and forage for food. ( It was Christmas time when the raccoon made it's way down to the basement and found the Hershey kisses, unwrapped them from their foil, and ate about ten or so before I discovered him down there and took them away; those were for baking cookies) Now I'm able to sleep soundly at night, knowing that unwanted critters can no longer get in. The only reason I gave it 4 stars instead of 5 is because the opening and tunnel that they go through is a tad too small; you can tell they're squeezing slowly through it...it would be better if it were about an inch or two bigger all the way around.

This door does not work as desired. My cat was able to open it from the locked side and also was able to flip the switch to unlock the door. If you want to keep your cat locked out of a room, I would not recommend this door.

I saw other reviews that this only works for certain chips - I looked mine up before I bought it and both cats had one of the standard types. Kept the packaging just in case I had issues for the first week. Super easy to teach the scanner each chip code. Much less easy to train the cats, I suggest looking up videos on tips like I did. Has been working great for 3 weeks now with no issues like others described, we'll see how long the battery lasts! One less star because this only reads the chip from one side and has mechanical switch on the other side that you set for the 4 way locking. If you need to only let certain cats outside and no other animals in do not buy this. I only needed this to separate different cat foods (prescription and non) so I set it up that the chip read is to get in but they can just push their way out anytime if it is unlocked. If you need chip read from both sides, keep looking. All of my cats are 12 lb or less and fit thru pretty easy. If your 15 lb cat is wide and not long this may not be for them. Door dimensions are provided, do a cardboard cutout to size if you really want to make sure before you buy like I did.