1. [Compatibility]: The AirTags case is designed and die-cut, especially compatible with Apple AirTag 2021, perfect output. The 4-packs of cases are 4 different color combinations compatible with the Apple AirTag keychain to make your life more colorful. 2. [Shockproof Silicone Material]: The bumper compatible with your delicate. The keychain is made of waterproof silicone, which could provide a stronger buffer in case of bumps or drops to fully protect your. 3. [Anti-lost with key ring]: This case comes with a fashionable metal carabiner, so you can easily hang the air tags anywhere, you can attach the air tag necklace holder to look like a dog/cat collar, your car. key ring, your bag, the child's satchel, valuables, etc. 4. [Easy Installation]: The exposed hole design is very conducive to signal transmission and humanized installation. Simply put your tag in the silicone sleeve. A precise cut reveals the original logo of the brand. 5. [Best Gifts]: Spoil your loved ones with a great gift: Cheer up your wives, girlfriends, husbands, boyfriends or kids with a premium silicone keychain. the package includes the keyring set of 4.