Mbps up and down for single screen
2.0 Mbps up 4.0 Mbps down for dual screen
2.0 Mbps up 6.0 Mbps down for triple screen
For screen sharing only: 150-300kbps
For audio VoIP: 60-80kbps
Source: https://support.zoom.us/hc/en-us/articles/204003179-System-Requirements-for-Zoom-Rooms