User Manual Foscam 8595764028 G2 1080P 25fps WiFi Security IP Surveillance Camera

It can. It works great. You also have motion detection and can snap a picture. You have to add a microphone (easy to do).

This camera doesn't offer sound. It doesn't have a speaker or microphone

No, you must use a mic and speaker similar to what you use for a Computer. I have been trying to get a out door mic to work and Support has been not help. Just keep telling me it is the Mic and speaker manufacture problem. though it works fine everywhere else.

Up to 4 cameras in moblie phone via app, 32 in PC with VMS software.

No. It comes with a free trial of the Foscam cloud, however you have to pay for it after the trial period. You can install a MicroSD card and access it remotely.

The motion detector doesn't have a range adjustment.But you can adjust the sensitivity from "low to medium, high".

Plug the ethernet cable in the camera then connect to wifi then unplug the ethernet cable and you should be good to go.