1，App connects to the device via Bluetooth
2，When the device is disconnected from the Bluetooth of the mobile phone, the device will sound an alarm
3，When you press the corresponding button of the device, the app will send the signal to other people you bind
2，When the device is disconnected from the Bluetooth of the mobile phone, the device will sound an alarm
3，When you press the corresponding button of the device, the app will send the signal to other people you bind
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