Using the new Bluetooth 4.0 technology, the power consumption is extremely low, powered by a CR2032 button battery, which is convenient to replace. Supports iOS 11.0 and above; Android 8.0 and above systems (requires mobile phone with Bluetooth 4.0 or higher). Object finding function: Pair the anti-loss device with valuable items. When connected to the mobile phone via Bluetooth through the app, use the app's search feature to make the device emit a sound to locate the item. Find phone function: When the device is connected to the phone via Bluetooth, double-click the device button to trigger the phone to ring, helping you locate it. Two-way alarm: Enable the "Bluetooth disconnection alarm" in the app to activate two-way anti-loss protection. If the connection between the phone and the device is lost, both the phone and the device will sound an alarm to alert you. Selfie function: When connected to the phone via Bluetooth, use the app's selfie feature to take photos wirelessly. Recording function: Double-click the device button to start recording within the app. Disconnect location: When the device disconnects from the phone via Bluetooth, the app records the last known location of the item, which can be viewed on a map within the app. Color: black Material: plastic Size: 34x38x8mm Package Contents: 1 x GPS tracker Only the above package content is included; other items are not included. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement error is +/- 1-3cm.