Replaceable battery and IP67 waterproof & dustproof: The air tags feature IP67 waterproofing, able to withstand splashes, rain, and brief submersion. The luggage tracker comes with a replaceable battery lasting up to one year, allowing you to check the battery status within the Find My app. (iOS Only, Not for Android)Privacy protection and easy pairing: wallet tracker protects privacy and security, and all communication with Find My Network is anonymous and encrypted. Location data and historical records will never be stored on the airtags. Open the "Find My app" and Bluetooth, click on "Items," then "Add Item," select "Other Supported Item," and follow the in-app instructions for easy pairing. (Note: Only compatible with iOS devices, not compatible with Android)Track your items with ease: Use smart tag to effortlessly track and locate your items. Within Apple's signal range, connect to the global "Find My" network spanning billions of iOS devices to guide you to nearby or update your items to their latest location. No monthly fees required, simply use the "Play Sound" feature within Bluetooth range (60m/200ft) to quickly find your items. (iOS Only, Not for Android)Compact and lightweight tracker: The smooth surface of the airtags prevents scratching other items. The weight of tracking tags is only 6 grams, it is easy to carry around. The ultra-thin, lightweight, and durable design of key finder makes it perfect for keys, wallets, backpacks, suitcases, laptops, and luggage. (iOS Only, Not for Android)Left Behind Remind and Lost Mode: If your item with air tags is left behind and disconnected from a Bluetooth-enabled iOS device, the "Find My" app will immediately send you a notification of the item's loss. Whether you accidentally dropped your wallet or left your keys at the office, our airtags will promptly remind you to retrieve your items. (iOS Only, Not for Android)