Warning! Airtag Not Included Airtag Compatible Cat Collar: Insert airtag into cat’s collar with holder to create a lightweight cat tracker. You can track your pets through the app on your phone. AirTag Cat Collar Adjustable Size: The length is adjustable to fit pet neck sizes from 30-40cm . The cat collar is made of high quality durable fabric, perfect for most puppies and small pets. Cat collar with safety lock: The cat collar is designed with a safety buckle that can be easily released with a firm pull. When your cat gets stuck on something, the cat collar’s safety latch quickly releases under pressure, protecting your pet.