The Smart Finder easily connects to the Apple Find My app on your iPhone, iPad, Mac, or the Find Items app on your Apple Watch. It uses Bluetooth to transmit its location to nearby iPhones. These iPhones send that information back to your iPhone, so you can see the Finder on a map in the Find My app. The Smart Finder will alert you if you leave it behind and if someone finds it. Plus, with a simple tap in the app, you can play a loud sound to help you locate your belongings.