4x Smart Search Key Tracker Bluetooth Locator Features: Connect to Bluetooth mobile phone for two-way search and can connect to 6 anti-lost devices at the same time. Alarm reminder to prevent loss. Provides "Do Not Disturb" functionality. Control the recording function of the mobile phone via the anti-loss device. Product Settings: Material: ABS Battery: CR2032 Net Weight: 9g Working distance: 10 meters Bluetooth Version: Bluetooth 4.0 Size: 50x30x10mm Color: Black, White, Green, Pink Red, Blue. Application: iSearching/Kindelf. Suitable for: wallets, keys, children, pets, bags and other items. Compatible mobile phones: Bluetooth 4.0 and iOS 12.0 and above, Android 10.0 and above smartphones. Steps of use: Download the iSearching/Kindelf app: Apple iPhone Search and download from the App Store. Download it from Goggle Play Market for Android phones (except for mainland China users). After installation, enable "Automatic Operations" in permission management. Power on: Press and hold the product button for about 3 seconds and hear two beeps. Turn on Bluetooth on your phone and open the app to search for connections (note that Bluetooth on your phone is not connected). To add a new device, click the '+' button in the upper right corner. Other features: Two-way alarm: The mobile phone and anti-lost device trigger an alarm at the same time when they exceed the set distance (10 meters). Find the mobile phone: Double-click the anti-loss device button and the mobile phone will trigger an alarm. Location History: Click the "Location" button to view location and loss history. Control the camera: Click the "Camera" button to turn on the phone's camera and take pictures. Device Settings: Click the arrow to the right of the "Alarm" button to enter the settings. You can customize the device name, alarm and volume, etc. It is recommended that you do not change the default anti-loss distance. 3. Note on use When using, make sure the app is still running (maybe in the background), Bluetooth is connected, and the tracker will ring when the app is closed. You can press the button or reopen the app to stop it. Once use is complete, press and hold the button for 5 seconds to disconnect. If you're having trouble logging in next time, you can drag left to remove the connection field and click "+" to reset.