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PlexiDor Performance Pet Doors Electronic RFID Collar Key for Use with Electronic Door – Black

Amazon.com Price: $61.20 (as of 04/09/2023 23:27 PST- Details)

Two collar keys are included with PlexiDor PDE Electronic Door and PlexiDor PDE Electronic Door Series Dog doors.
This item is sold as a replacement or additional collar key. Programable to thousands of key codes.
Made of hardened nylon to withstand playful pets. Securely snaps onto a collar and won’t fall off.