The Ubiquiti Door Hub is a single-door mechanism that offers comprehensive entry and exit control via connected Access Readers. It features (2) lock terminals (12V and Dry), (2) AUX terminals for an external siren and automatic door opener, and (4) additional inputs for sensors and buttons. Powered via PoE++, it integrates seamlessly with two UniFi Access readers and two UniFi Protect cameras or UniFi Protect Chimes for enhanced security. Ideal for creating a robust access control system.