Left Behind Reminder: If your key finder loses Bluetooth connection with your device, you will be notified immediately. Whether you accidentally left your bag at the gym or forgot your keys at the office, the Left Behind Reminder helps you locate your items in time. Find Nearby: Ring your tag when it is within Bluetooth range using the Find My app. Click the Play Sound button and the device will emit a "beep, beep, beep" sound. You can locate your keys nearby based on the sound. Long-distance Find: When out of Bluetooth range, use the Find My app to view the latest location of the item on a map. Lost Mode: When adding an item, you can enable Lost Mode and leave your email or phone number. Once your tag is linked to your ID, others can pair it and view your contact information through the Find My app to return your item. Share with Friends and Family: With the Find My app, you can invite family members to view the location of your item. Compatible with Find My feature: Use the pre-installed Find My app and add the tag to the Items tab. Then you can locate your items anywhere in the world using the network of millions of devices. Note: The Find My feature only works with iOS, iPadOS, or macOS devices. Waterproof with replaceable battery: Even if exposed to rain, you can use it confidently during outdoor trips. Color: Black Material: Plastic Package Contents: 1 x Smart Tag Tracker Note: Light reflection and different displays may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.