Looks like their $300/4GB/1U/4bay and $500/8GB/2U/7bay half-depth devices with AWS-Annapurna SoC can run either NAS or NVR Linux. Bluetooth in a rackable device is unusual. OS might be replaceable with mainline Debian.

https://github.com/NeccoNeko/UNVR-diy-os/blob/main/IMAGES.md