Step 1: QR code scan install the app "Smart Endoscope" on your mobile phone. Step 2: Turn on the endoscope and a Wi-Fi signal named "WiFi monitor-xxxxxx" will be generated. Step 3: Open the WiFi settings on your phone and connect to the WiFi called "WiFi Monitor-xxxx" (no password required). Step 4: Press the "+" button in the app "Smart Endoscope" to connect the device. Finally, it can realise the simultaneous viewing of the endoscopic screen and mobile phone