We bought 2 of these holders for our 2 dogs and they are perfect. Easily attaches to any collar or harness and stays in place. Anyway, the dog doesn't care. Both of our dogs are microchipped, but the microchip will only work if someone takes your pet for a scan. Air Tag works as long as your pet is walking next to someone with iPhoneEdit to add: The first one broke and fell off my pup in less than 12 hours. The second broke after 3 days.
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