About this item Smart Crowd-Finding Network: Item finders can easily locate your item via the 'Find My' app (compatible with Apple iOS ONLY), activate sounds to help locate it when within Bluetooth range (100m/350ft), or easily view your nearest location on the 'Find My' web map. Benefit from millions of Apple devices globally for anonymous, encrypted location updates while keeping your privacy protected only you can see your items whereabouts. LEFT BEHIND REMIND: Attach this tracker tag to anything you need to monitor. If your belonging is left beyond the Bluetooth range, the item locator will send you a reminder within 10 minutes (ensure notification settings are turned on in advance) so you can go back and retrieve it. Suitable for Multiple Scenarios to Prevent Item Loss: Each set includes 4 anti-loss tags that can be attached to keys, luggage, handbags, backpacks, wallets, and other important belongingssay goodbye to the hassle of misplaced items. REPLACEABLE BATTERY: A CR2032 batt