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 Specifications: 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 Usage Instructions: Download the iSearching / Kindelf app: For Apple iPhone, search and download from the App Store. For Android phones, download from Google Play Market (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 until you hear two beeps. Turn on Bluetooth on your phone and open the app to search for connections (note that Bluetooth on your phone should not be manually connected). To add a new device, click the '+' button in the upper right corner. Additional Features: Two-way alarm: The mobile phone and anti-lost device trigger an alarm simultaneously 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 settings. You can customize the device name, alarm, and volume. It is recommended not to change the default anti-loss distance. Usage Notes: When using, make sure the app is still running (possibly in the background), and Bluetooth is connected. The tracker will ring when the app is closed. Press the button or reopen the app to stop the alarm. After use, press and hold the button for 5 seconds to disconnect. If you have trouble logging in next time, swipe left to remove the connection field and click "+" to reset.