Here is a compact video camera that lets you record 4K video anywhere. The Sony UMC-S3CA camera is ideal for live action shooting, documentaries, and remove PoV work. It has a 35mm full-frame Exmor CMOS sensor with great low-light performance.
The UMC-S3CA records video in XAVC S format at up to 100 Mbps. You can also capture 12MP still images with it. Its genlock function makes the device ideal for multi-camera scenarios. Interchangeable E-mount FE lenses are also available for it.