Upgrade your building security with the UNV Four Doors Recognition Access Control Controller OER-SR42 ✅ Simple control for 4 doors from one controller Fast recognition + reliable access decisions Perfect for Offices | Buildings | Warehouses | Schools | Clinics Key benefits 🔒 Strong security for staff + visitors ⚡ Quick response for smoother entry flow 🧩 Easy to integrate with access systems + door hardware 🛠️ Great for new installs or upgrades Use cases Main entrance | Staff doors | Restricted areas | Back doors If you need a clean professional scalable access control setup the OER-SR42 is a smart choice for modern sites.