@Tibor74 You can but not by connecting the wi-fi cameras directly to the NVR.  I dont believe the VIGI NVR1104H-4P has wi-fi capability built-in however you should be able to use wi-fi cameras with it by including a wi-fi router.  For example, if you have a spare wi-fi router that has some LAN ports on it,  you could connect the router to the NVR via one of the LAN ports on the router and then connect your camera to the router via wi-fi.  You would need to configure your routers DHCP server to provide an IP address within the range expected by the NVR.  The solution would then be that your camera is connected to the router via wi-fi and router connected to the NVR via LAN cable.  This would also give you some freedom where you place the router.   You could place it as near to the camera as needed to receive a good wi-fi connection and then run the network cable back to the NVR.

Hope this makes sense.