Collar case by Elago for placing on your pet's collar and protecting the AirTag from scratches and other damages. The AirTag uses both Bluetooth and a more precise positioning technology called Ultra Wideband, so it will guide you towards your pet like a compass if you are close to it. However, if you are further away, the Apple Find My app network and Bluetooth from other iPhone users will help you locate your pet. Its silicone construction makes it flexible, allowing for frequent placement and removal unlike a plastic that can get damaged.