When the panic alarm button is not paired, you can enter pairing mode by reassembling the battery. When the panic alarm button already has a pairing record, you need to unpair the device on APPs, then press and hold the pairing button (please take apart the back lid to press the pairing button) on the device for 5 seconds. When you see the green light flashing continuously, the panic alarm button has entered pairing mode, and you can operate the app to connect to the RBF network. Another method is to scan the QR code on the panic alarm button to connect to the network.