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Ideal Pet Products Designer Series Ruff Weather Alarm Alert Pet Door, Super Large 15″ x 23.5″ Flap Size

Amazon.com Price: $282.35 (as of 04/07/2023 00:23 PST- Details)

Alarm sounds to alert you when Armed Lock-out slide is removed! (Requires 2-aaa batteries, not included)
Double, flexible vinyl flaps create a 3 inch air pocket for maximum insulation and energy efficiency
Easily installs in doors ranging from 1″ in thickness