Features: Parking site searching Voice recording & Self-portrait Bluetooth connection with up to 2 additional anti-lost devices simultaneously. Easily track lost items using your smartphone app. Helps protect your children, pets, and valuables from being lost. Attach to keys, wallets, phones, watches, pets, kids, or other valuable items. Low energy consumption with a replaceable CR2032 lithium coin battery; lasts approximately six monthseasy to replace yourself. Compact and portable design. Specifications: Material: Plastic Color: 2 x White + 2 x Black Quantity: 4 pcs Shape: Square (37 x 37 mm) Working Distance: Up to 25 meters in outdoor environment Battery: CR2032 Lithium Coin Battery 1. Find Lost Items: Ring your lost item from your smartphone within Bluetooth range; the anti-lost device will emit a loud sound until located. 2. Find Your Phone: Double-press the button on the anti-lost device to make your phone ring. 3. Last Place Seen: Keep the app running in the background to record the last known location and time of your item. 4. Community Find: Join a global network where users can help locate your lost item by detecting it when nearby and updating its location. Compatible Devices: Bluetooth Version: Bluetooth 4.0 Low Energy Apple iOS 11.0 and above (iPhone 5S and newer), Android 9.0 and above Operations: 1. Power On/Off: * Power On: Press and hold for about 3 seconds until you hear three beeps ("di di di") and the indicator flashes rapidly for 10 seconds. If no connection is made or buttons pressed, it flashes every 2 seconds for 30 seconds before shutting down. * Power Off: Press and hold for about 3 seconds until a long beep ("drip") sounds and the indicator light turns off. 2. Add Device: Enable Bluetooth on your smartphone, open the app, skip the startup screen, and go directly to the "Add Device" interface. Refer to the instruction manual for differences between Android and iOS interfaces. Tap the "Add Device" icon. After detecting a new device, select Auto Connect. You may rename the device if desired. Once connected, tap the alarm icon to trigger the anti-lost device to emit a "drip" sound. The sound continues until you tap again to stop. Access settings to customize ringtones, set alarm distance, and more. Go to System Settings to view recordings and configure double-press actions. 3. Take Photos: Use the camera function by pressing the button on the anti-lost device to take photos remotely. 4. Position Tracking: This feature records the last known location when the anti-lost device disconnects from the phone. View disconnection location in the "Lost Record." Requires GPS enabled and an active internet connection on the phone. Package Includes: 4 x Anti-Lost Trackers (2 White + 2 Black) When shopping, please check product dimensions to ensure suitability. Detailed information including features and specifications is provided in the title and description. We aim for complete customer satisfaction. If you have any questions or concerns, feel free to were here to help. Thank you for choosing our product. We hope you enjoy using it.