This is an AI summary, which is an experiment of ours, AI can make mistakes and people should always refer to the official brand write-ups for certainty.
The Ubiquiti UniFi Enterprise 3U Network Video Recorder (ENVR) is a high-performance surveillance solution engineered for large-scale enterprise environments. This robust 3U rack-mountable appliance provides centralised management for extensive security systems, supporting up to 70 4K cameras or 210 Full HD cameras. With sixteen 2.5/3.5" drive bays, it offers massive storage potential, ensuring long-term video retention and reliable data protection through integrated RAID technology.
Designed for maximum uptime and resilience, the ENVR features dual hot-swappable 550W power supply units to prevent system downtime in the event of a power failure. Connectivity is optimised for high-speed data transfer with two 10G SFP+ ports and a 10 GbE RJ45 port, allowing for seamless integration into sophisticated fibre or Ethernet networks. The system is powered by an 8-core processor and 32 GB of memory, delivering the responsiveness required for demanding multi-site administration.
Key features include:

Extensive Capacity: 16 drive bays compatible with both HDD and SSD for versatile storage configurations.

Superior Connectivity: Dedicated 10G SFP+ and 10 GbE ports for high-bandwidth camera uplinks.

Enhanced Reliability: Redundant, hot-swappable power supplies and RAID support for critical data integrity.

Seamless Management: Fully compatible with UniFi Protect for intuitive, licence-free security oversight.