Acer is showcasing its CastMaster system as part of its 2020 General Presentation Conference (GPC). This product consists of a receiver and a transmitter in the form of a large globular button. The OEM asserts that this "Plug-and-Play" arrangement will render the set-up and control of a presentation constant across any environment.
https://www.notebookcheck.net/The-Acer-CastMaster-may-prove-a-minimalist-solution-to-many-traditional-presentation-issues.477061.0.html