1.Dual SIM card(Failover mode) 2.Supports OpenVPN which rescue data security 3.Supports Mainstream cloud platform protocols(MQTT SSL, AWS IOT�¯�¼?Azure, Ali Cloud and Huawei Cloud) 4.Various I/O ports(4AI,2DI and 2DO ) 5.Quick access to cloud platform with RS485 master and support Modbus to convert MQTT 6.Automatically monitor the status of LAN port (disconnect alarm) to realize real-time monitoring of the network.