Secure models require the Secure Link WiFi hub for compatibility. It is advisable to pair each lock with its own WiFi hub to maintain a seamless connection between the hub and the lock. The lock must be within Bluetooth range of the WiFi hub, and the WiFi hub should also be within Bluetooth range of the internet router. Typically, Bluetooth operates effectively within a range of 25-30 feet without obstacles, although walls and other barriers may reduce this to an optimal range of 10-15 feet. For Vision models, compatibility is ensured with the Vision Connect WiFi hub provided with the lock, which directly connects to your internet router via an Ethernet cable.