1、Heavy Duty: Manfactured with metal shell, electronic components, protection level IP30, metal shell securely isolates the system, especially suitable for industrial control field applications. 2、Network Update: Adopt GSM/GPRS/3G/4G network communication, allowing usage without distance restrictions. It's designed with a modular structure, meaning upgrades to GSM/3G/4G networks can be easily achieved by simply replacing the module. 3、RS485 Serial Port: Supports for Modbus Slave and for Modbus RTU Master protocols, and connects to SCADA, HMI, DSC, and PLC, can be used to expand up to 16 for Modbus Slave devices, such as for Modbus RTU remote data acquisition module, electricity meter, water meter, diesel generator, inverter, PLC, etc. Up to 320 data points to set alarm conditions and customize alarm SMS content 4、SMS Alarm Module: The PLC send and receive SMS commands directly that supports for Schneider and for Modbus protocols, can monitor a number of SMS alarms based on for Modbus instrument/ECU data abnormal limit, etc., and can also query the communication status between the host and the slave through SMS, and will send SMS notification when have failure communication. 5、Transparent Data Transmission: Embedded TCP/IP protocol stack, support transparent data transmission protocol, support TCP/UDP, for Modbus TCP protocol, for Modbus RTU over TCP protocol, MQTT protocol, barium Rhenium IoT RTU protocol and transparent transmission function. RS485 also supports transparent data transmission; 6、USB Interface and Reconnect Server: Support USB interface to configure parameters, read, export history records and upgrade programs through computer configuration software; Supports the active connection to the server with the custom handshake protocol and the automatic reconnection to the server after the disconnection. Item Type:  Cellular IOT Alarm Device Material: Metal, Electronic Components Plug Voltage: Wide voltage 100-240V Power Supply Power Voltage: 9-36V DC Power Consumption: Normal: 50mA at 12V, Maximum: 150mA at 12V Power Output:2 Channels Output Current: 1500mA at 12V (maximum) Power Protection: Reverse Connection Protection, ESD Air: 15KV, Surge: 4KV Serial Ports: Number of Serial Ports: 1 x RS485 Baud Rate: 1200bps-115200bps Data Bits: 8 Parity: None, Even, Odd Stop Bits: 1,2 Protocol: For ModbusRTU (slave), For ModbusRTU (master) Serial Port Protection: ESD Contact: 8KV, Surge: 4KV (8/20us) 1 x Cellular IOT Alarm Device 1 x USB Cable 1 x Cellular Network Antenna 1 x Power Adapter 1 x Rail Mounting Clip 3 x Screws 1 x Converter 1 x SIM Card Ejector Pin 1 x 4 Pin Wire Terminal 1 x 6 Pin Wire Terminal 2 x 8 Pin Wire Terminal 1 x 12 Pin Wire Terminal