Left Behind Notification: Get instant notifications on your phone if you leave your tracker tag behind. Whether you accidentally leave your backpack at the airport or forget your car keys at the office, this device will remind you to retrieve your items. What You Will Get: This package includes 4 tracker tags, 4 keychains, and 4 lanyards. You can securely attach the tracker tags to luggage, keys, bags, wallets, bikes, and more. Long-lasting CR2032 Battery: Each tracker comes with one CR2032 battery that lasts up to one year. It continues to function reliably even when left outdoors. Ultra-thin, Waterproof & Anti-fall: The tracker tag weighs only 0.7 ounces and is easy to carry. With a waterproof rating, it is designed to withstand water splashes and rain. Built with durable materials, it offers long-lasting protection. Track Your Items Easily: Use the Find My app (compatible with Apple iOS only) to track and locate your items globally. Activate sound playback to find your item when within range (up to 100 meters or 350 feet), or view its last known location on the "Find My" web map.