IP Digital Camera Set up and Installation / CCTV Cameras

I purchased a 4 x IP Camera Security System.

I have been able to get 2 of the cameras to work and show on my monitor through the systems DVR.

Can someone give me more direction.

The Instruction are by someone that is not fluent in English.

Once connected and installed can I remove the Ethernet cable and the Camera work via WIFI?

Then all I would need it power to the cameras.

It is a Szsinocam System.

1.00mp IP Cameras. on the other side they say CCTV Camera.

I want to install 4 of these cameras and be able to view them via Internet to my cell phone and my Computers.

Do I have to have a Ethernet cable connected to each one all the time? They have IPPAD Number

and also a P2P Number.

Any direction at all would be Greatly Appreciated..