The UniFi Cloud Key Gen 1 is a small, standalone hardware device that runs the UniFi Network Controller software, providing a dedicated and always-on controller for managing UniFi networks locally with the option for remote access via a private cloud. It features a quad-core processor and 2 GB RAM, along with a Gigabit Ethernet port for connectivity and power (via PoE). While it was designed for small networks, it has limitations, including potential instability with the database, which can require a factory reset after an unexpected shutdown, and a limited capacity for larger deployments.