Two-way search function Loss reminder Remote camera function GPS locator against loss Location function Two-way search function: If the item is not found, click the horn in the app to find the item through the device's sound. If the phone is not found, double-click the device button. The phone will alarm. Loss reminder: When the distance between the anti-loss device and the mobile phone is more than 15 meters, the alarm will be triggered in two directions to remind you to check your belongings in time. Tracking function: The tracking device app records the position of the mobile phone and the lost device when the Bluetooth connection is broken, so that the items can be tracked. The tracking device is equipped with the new Bluetooth 4.0 technology, ultra-low power consumption, CR2032 button battery and long standby time for more than 10 months. Remote camera function: With the remote app and the wireless remote camera, you can easily take selfies and group photos. Use the search function in the app to make the lost device beep to find the item. When the device is connected to the Bluetooth-compatible mobile phone app, when you need to find the mobile phone, double-click the device button to call the mobile phone, and the mobile phone will emit a sound. If the device is connected to the Bluetooth-compatible mobile phone app, use the selfie function in the software to take pictures wirelessly. Double-click the device power button to record in the app. When the item is disconnected from the Bluetooth-compatible mobile phone app, the app will record the lost position after the item is disconnected, and the lost position after disconnection will be displayed on the map in the app. Item name: GPS locator against loss Material: Acrylic/ABS Shape: Round Size: 42*42*8mm Battery: CR2032 button cell (built-in) APP: search Version requirements: iOS version 11.0, Android version 8.0 and later Quantity: 4 pcs Note: - There may be a small size error in manual measurement. - Color deviation may vary due to different monitor settings, please understand.