Generally, we think there are only a few good reasons for buying such a door:

•   To let your pets come and go while keeping out neighborhood pets or other animals
   
•   To keep one pet in, often a cat, letting others out.
   
•   To improve security at least as much as locking a window does.

In addition to these there are a few less common ones:

•   To lock baby in while letting the pets out
   
•   To prevent the wind from blowing open the pet door. Electronic pet doors are wind-proof.

If none of these reasons fit you then we suggest getting a manual pet door instead. It will be simpler, less expensive and more reliable.

Having said all that, Plexidor has developed a particularly impressive design for a motorized dog door. First, and very significantly, the collar key is actually an RFID chip--which you've probably heard about in other applications like inventory control. This leading-edge technology is passive, no batteries to fail just when you need them, and an unlimited number of "combinations" for unlocking the pet door. So you can have as many pets as you like using the door and never have to worry about the neighbors pets coming in your door.

Also, the RFID chip doesn't interfere with your existing hidden fencing system or your alarm system and nearby appliances won't set it off. It's waterproof, shockproof and rugged.

In the event of a power failure, the pet door resets automatically so there is no need to reprogram.

Plexidor Electronic Dog Door for Doors
Exterior View


Plexidor Electronic Dog Door for Doors
Interior View