Felicity WiFi module is a small device, often a dongle, that enables remote monitoring and control of Felicity solar inverters and battery systems via a Wi-Fi network. By connecting to a solar inverter with a communication cable and then to your home's Wi-Fi, users can access the FelicitySolar app (iOS/Android) to track system parameters, view historical data, and manage the system in real-time from their phones. The module uses the IEEE 802.11b/g/n standard, supports a 2.4 GHz frequency, and has an IP65 waterproof rating for durability.