Works with Apple Find My: Just use the pre-installed Find My app and add SmartTrack Link to the Items tab. You can then locate it anywhere in the world using Apple's network of millions of devices. Note: Apple Find My features only work if used with an iOS, iPadOS, or macOS device. Free Left-Behind Alerts: Avoid losing your belongings in the first place with instant left-behind alerts via the Apple Find My app—with no added fee. Find Your Phone in Silent Mode: Avoid tearing up your apartment searching for your phone. With just a double tap, your phone rings—even in silent mode.The function only works with the eufy Security app. Always Linked to Your Item: If something's lost, you're always connected via Link's QR code. A person who finds your item can scan and see only the contact information you share.The function only works with the eufy Security app. Share with Friends and Family: With the eufy Security app you can let others know the location of your items too. You Can't Miss the Alarm: Link sounds an alarm so loud, you can hear it if it's covered or in the next room. Water Resistant with a Replaceable CR2032 Battery: Link is safe—even if it's left in the rain—with its water-resistant coating. And it comes with a replaceable battery that lasts up to a year.