Replacement battery door for the Pawz Away Receiver Collar (RFA-377) for all PetSafe® Pawz Away pet proofing barriers including the Indoor Barrier, Outdoor Barrier, Mini Barrier, and Threshold Barrier (ZND-1200, PWF00-11923, PWF00-13665, and PWF00-14406 systems). The kit includes the battery door and the rubber O-ring to secure the door and batteries. Batteries aren't included in this kit.