Please note that Airtag is not included in the package. It is designed for Apple Airtag GPS tracker, suitable for small animals such as dogs and cats. The airtag collar comes with an airtag box, waterproof and shockproof. Designed for small collars for cats and small animals, retractable and out of reach of pets. Safety Collar - The collar is designed with a break-type safety buckle. The round ears cat face safety buckle is adjustable anti-choking and anti-prick. It can be easily released when pulled hard, which makes your pet more secure while walking around the house. Adjustable necklace size: adjustable length, minimum length 22 cm, maximum length 35 cm. 1 cm wide, suitable for most puppies and small pets