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 and can be replaced easily. 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 items via smartphone within Bluetooth range; the anti-lost device emits a loud sound until found. 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 – Connect to a global network where users help locate lost items by detecting them 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 about 3 seconds; three beeps ("di di di") will sound, indicator flashes quickly for 10 seconds, then flashes every 2 seconds for 30 seconds if no action is taken 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 to trigger the anti-lost device to emit a "drip" sound. The sound continues until manually stopped by tapping the alarm icon again. Access settings to customize ringtones, set alarm distance, and more. Go to System Settings to view voice recordings and configure double-click actions. 3. Camera Function: Use the camera feature by pressing the button on the anti-lost device to take photos remotely. 4. Positioning: This function records the last known position when the anti-lost device disconnects from the phone. View disconnection location in the "Lost Record." Requires GPS enabled and active internet connection on the phone. Package Includes: 4 x Anti-Lost Trackers (2 White + 2 Black)