MHCOZY DIY 5V 12V Inching/Self-Locking WiFi Relay Switch Module (12V, 1.44W)

Can I hook two boards up to one phone?

how much current does it require at 5 volts dc?

When I receive the unit, all I have to do is download app to phone, connect it and it will work???No programming by me??

I have an outside doorbell, which, when pressed, in my internal unit triggers an electronic buzzer. i saw a12v tension when pressed. can i use your de