Product parameters: Material: ABS Battery capacity: 220mAh Net weight: 9.6 grams bag gross weight: 12.5 grams, box gross weight: 21 grams Color: black or white or pink or blue(Optional) Working distance: 10 meters Compatibility: iOS 12.0 or above and Android 10.0 or above smartphone (APP compatibility is subject to real-time update) Suitable for: wallets, keys, bags and other items Color box size: 10.5x6.6x1.7cm Package weight: about 21 grams Features: Two-way search function: The anti-lost device is connected to the Bluetooth function of the mobile phone, click "click alarm" in the APP, the anti-lost device will make a sound, and find the item through the sound. Double-click the button of the anti-lost device to make the phone beep, and you can find the phone. Disconnection alarm function: in the connected state, when the anti-lost device exceeds the set Bluetooth range, the mobile phone and the anti-lost device will alarm at the same time (to use this function, the soft switch of "disconnect alarm" must be turned on in the APP settings). Positioning break point function: On the mobile APP, you can check the map positioning when the anti-lost device is disconnected. It does not have the tracking and positioning function, and only supports historical record positioning. Remote Selfie function: You can use the mobile phone APP to take pictures remotely by clicking the button of the anti-lost device. Recording function: When the anti-lost device is connected, the mobile phone recording function can be controlled through the anti-lost device (the "double-click recording" soft switch must be set in the APP). Packaging Information: Anti-lost devicex1 Manualx1