Features: Parking site searching Voice recording & Self-portrait Bluetooth connection with 2 additional anti-lost devices simultaneously. Easily track lost items using your smartphone app. Helps protect kids, pets, and valuables from being lost. Attach to keys, wallets, phones, watches, pets, kids, or other valuable items. Low energy consumption with replaceable CR2032 lithium coin battery; lasts up to six months—easy to replace. Compact and portable design. Specifications: Material: Plastic Color: 2x White + 2x Black Quantity: 4 pcs Shape: Square (37*37mm) Working Distance: 25m in outdoor environment Battery: CR2032 Lithium Coin Battery 1. Find lost items – Ring your lost item via smartphone within Bluetooth range; the anti-lost device emits 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 – With the app running in the background, it records the last known location and time of your item. 4. Community Find feature – Join a global network where users help locate lost items by updating their positions when nearby. Compatible Devices: Bluetooth Version: Bluetooth 4.0 Low Energy Apple iOS 11.0 and above (iPhone 5S and later), Android 9.0 and above Operations: 1. Power On/Off: * Power on: Press and hold for approximately 3 seconds; three beeps "di di di" will sound, indicator flashes rapidly for 10 seconds. If no connection or button input is made, it blinks every 2 seconds for 30 seconds before shutting down. * Power off: Press and hold for about 3 seconds; one 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 as needed. Once connected, tap the alarm icon—the device will emit a "drip" sound that continues until manually stopped by tapping again. Access settings to customize ringtones, set alarm distance, and more. In system settings, view voice recordings and configure double-press functions. 3. Camera Function: Use the camera control feature by pressing the button on the anti-lost device to take photos remotely. 4. Positioning: When the anti-lost device disconnects from the phone, the app saves the disconnection location under "Lost Record." Requires GPS enabled and active internet connection on the phone. Package Includes: 4 x Anti-Lost Trackers (2 White + 2 Black) Please check product dimensions before purchase to ensure suitability. Detailed product information including features and specifications is provided in the title and description. We aim for complete customer satisfaction. For any inquiries, feel free to reach out—we are ready to assist. Thank you for choosing our product. Enjoy peace of mind with smarter tracking.