Your existing door contacts and motion sensors don't speak SuperLink. The Relay closes that gap. It's a compact UniFi Protect device with dedicated I/O interfaces, so you can wire in third-party sensors and signaling devices without ripping out what already works. Plug it into your UniFi Protect network, configure through the controller, and your legacy hardware is talking to your cameras again. No new ecosystem to learn. No retraining the team. Just the bridge between what you've got and what you're building
| brand | Ubiquiti |
| model | USL-Relay |
| category | Technology / Networking |
| protocol | SuperLink |
| ecosystem | UniFi Protect |
| form_factor | Compact relay unit |