Bluetooth Tracking Technology: Leveraging Bluetooth technology, mini anti-lost devices can pair with the user's smartphone, allowing tracking and locating items through a mobile app. When an item leaves the Bluetooth connection range, the phone will sound an alarm, alerting the user that the item may have been lost. Two-Way Finding Function: Users can use the mobile app to issue commands, causing the device to emit a sound, helping them quickly locate their item within a short distance. These devices also often have a reverse finding function, allowing users to press a button on the device to emit a sound on their phone, making it easier to find their phone in noisy environments. Smart Alerts and Location: Mini anti-lost devices often have smart alerts, automatically sending an alert via the mobile app when the distance between the item and the phone exceeds a preset range. Furthermore, some advanced models may also include GPS positioning, displaying the item's last location on a map via the mobile app, helping users find their lost items. These features make mini anti-lost devices a practical tool for preventing lost items in modern life, especially for those who frequently lose small items.