Wireless presentation systems are used to enable any meeting participant to Screen Mirroring the content from their laptop or smart devices to the large screen without cables. The wireless systems include transmitter and receiver; the wireless presentation system is normally used in the conference room for internal meetings. 

Video conference system is a telecommunication system that allows two or more people to communicate with each other in different places by means of visual images and audio (normally, it requires Microsoft Teams, Zoom or other third-party video conference software.). Video conferencing systems are used for many purposes, including business meetings, training sessions, lectures, conferences, and distance learning. The term “video” refers to using electronic cameras (cameras) and microphones to capture and transmit images.

so these two systems are used for different purposes. One is for internal meetings for screen mirroring; and the other use cameras and microphones to capture and transmit images to people in different places. 

ViewPlay hybrid wireless presentation with video conference system combines the above two functions into one device, which can be used as a wireless presentation tool and video conference device.