All the 4K webcams I have ever used have been 30 FPS max. To get the preferred 60 FPS, you typically need to set the quality to 720p or 1080p. As far as I know, there are no 4K60 (2160p60) webcams on the market.
The World s First 4K60 Webcam: Elgato Launches Facecam Pro streetinsider.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from streetinsider.com Daily Mail and Mail on Sunday newspapers.