Hi,
I can explain for you as follows:
- You have 4 wireless cameras. They record pictures and transfer those pictures via radio wave at the bandwidth of 2.4 Ghz.
- In order to receive signal from cameras, you need to have a device to receive like an antena. It is a video receiver such as VR31A, VR36A. You can connect directly this VR to your TV through Video port and enjoy pictures.
- CM19A is a PC interface. It connects to PC via USB ports and allow PC to control other X10 appliance via radio wave. However, you need a tranceiver to use with this device such as TM 751.
- UX23A can play the role of the VR, when a sensor detect a motion, it sends a command to UX23A, this device will wake up, record pictures from a specific camera and store in its memory. I think you can also connect this device to your TV via video port in your TV.
-VA11A is used to transform video signal from the video port in VRs or VCR to transfer to PC via USB ports. You can capture and store images in your PC.