Works with Apple Find My to locate anywhere in the world. Find Your Phone in Silent Mode. Instant left-behind alerts via the Apple Find My app with no added fee. If something's lost you're always connected via Link's QR code. eufy Security app lets you share location with family and friends. 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. Built-in Privacy: location and data are anonymous and encrypted. Up to 260ft (80 M) Bluetooth range. Includes 2 SmartTrack links.