SureFlap SureFeed Microchip RF Electronic ID Cat Flap Collar Tag Disc Key x 10 Unbranded aftermarket replacement tags that are 100% compatible with the SureFlap Cat Flaps and SureFeed Feeders at a fraction of the cost. Ideal for cats/dogs that are not microchipped or in cases where the pet chip doesn't read well. Worn on your pet's collar, the tag uses radio-frequency identification (RFID) technology by using a unique code to signal the flap/feeder to operate as programmed for only your pets. The tag does not require batteries to operate. Water resistant Dimensions: 35 x 24 x 5 mm (less than a gram)
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