Benefits of Tapo Contact Sensor T110: 1. Enhanced security: You receive real-time notifications on your phone when a door or window is unexpectedly opened, allowing you to take action immediately. 2. Versatile functionality: Tapo T110 can trigger other Tapo smart devices, such as lights or security cameras, through programmable Smart Actions. 3. 【*REQUIRES Tapo Hub】To utilize Tapo contact sensor T110, a Tapo hub H100 and a secured 2.4 GHz Wi-Fi network connection are required. Tapo T110 communicates with the hub via the Sub-1G Low-Power Wireless protocol, which provides extended battery life for the sensor and a wider coverage area compared to Wi-Fi. The Tapo Hub H100 can connect up to 64 sensors simultaneously and includes a 90dB ringer with 19 different ringing tones. The Tapo Hub also enables the use of【Smart Action】 for sensors and other Tapo devices even when the network is disconnected and is highly responsive.