Traditional Culture Encyclopedia - Photography and portraiture - Why can't the buzzer switch of Joan ·A20 camera be turned on?

Why can't the buzzer switch of Joan ·A20 camera be turned on?

First, turn on the power supply, connect the power supply, turn on the power switch on the back panel, the power indicator lights up, and the video recorder turns on.

After startup, you will hear a beep, and the video output defaults to multi-screen output mode.

Joan monitoring can't connect to the mobile phone software and can't open it. You can restart the phone or close the software background to re-enter. If not, you can uninstall the software and download it again.