internal notes
Features clues:

– 4K screen, the resolution of the input signal is up to 3840 x 2160.
– Ultra-fine 20px writing, 1mm recognizable writing diameter.
The built-in interactive whiteboard system allows participation by scanning a QR code.
Supports commenting on any 20 people writing interfaces at the same time.
Built-in Wi-Fi technology realizes wireless screen mirroring which supports 2/4-screen splitting without any cable connection.
Software and hardware video conferencing enables remote collaboration.