Compatibility : Compatible with AirTag 2021. 4 PACK Air tag Keychain Protective case. (*Airtag not include). The best alternative to Apple Airtag Case. | Anti-Lost Keychain Design : Airtag case with sturdy metal snap, make it easy to open/close spring-ring clasp help to quick lock/unlock. You can attach it to your car key, your bag, child's schoolbag, dog leash, valuables, and more. Easily swap and change where you attach your airtag on the things you want to keep track of. | Easy to Use : You can use our AirTag silicone sleeve to bind the AirTag to your key. When you can’t find the key when you go out again, you can easily find your keychain through the buzzing sound of the airbag. You can also tie it to your pet collar. When the pet is not in your sight, you can use your mobile phone to quickly locate the airbag and find your pet. You can also use AirTag silicone sleeves to bind airbags to your schoolbags, wallets, and other items. | Anti-Slipping : In view of the problem that the product is easy to fall, we have improved the entrance of the silicone sleeve, which is 1.5mm smaller. Don't worry, you can easily put your airtag in, but absolutely Will not fall out. We have done shaking tests, and not a single shot. Please rest assured. | High-Quality Material : Our silicone sleeve is made of the latest silicone material, which has superelasticity and will not be deformed no matter how you pull it. If you accidentally drop it during use, the AirTag will not be damaged. This is an environmentally friendly recyclable material, which is harmless to the human body and does not pollute the environment.