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Acrel Adw300 Mqtt Protocol 4G/WiFi/Lora Communication IoT Energy Meter. Multiple communication: RS485, WiFi, LoRa, 4G optional. High accuracy class 0.5S, reliable energy measurement. Multifunction monitoring: voltage, current, power, energy, harmonics. Support external CT, flexible for low-voltage distribution systems. Temperature & leakage current monitoring available. IoT & cloud platform compatible for remote energy management.