Feature:1. Main Function: This GSM analog alarm can fully monitor the state of 420mA, 05V transmitter, DC voltage, AC.2. Unique Deisgn: The user can dial the device number through the authorized number, and the device will automatically reject the call and immediately send the current status SMS message to the caller. The user can also query the current status through the SMS command.3. Support Multi Numbers: Support 10 authorized user numbers, alarm can be received alarm SMS, the last 5 authorized numbers can also receive alarm phone reminder.4. Cloud Platform Connecting: It also supports Modbus RTU and Modbus TCP to connect to the cloud platform, and can monitor the current status through the network in real time.5. Easy to Install: This GSM analog alarm is made of premium metal material, which is durable, stable and can be used for a long time.Specification:Item Type: GSM Analog Monitoring Alarm.Material: MetalOperating Voltage The standard power supply is 12VDC, which ranges from 0 to 36VDCPower Consumption: 20mA12V; Maximum power consumption: 150mA12VGSM/3G/4G:GSM Frequency: 850/900/1800/1900MHz (default)3G Network System: 3G WCDMA (optional)4G LTE Band: 4G LTE (optional)The SIM Card Port: Support 3V SIM cardExternal Antenna: SMA antenna interface,50 ohmsSupported Protocol: for Modbus RTU Over TCP. for Modbus TCPAnalog Input 0~5V/4~20mAPhase Input Voltage: 100~500VACBuilt in Battery: 3.7V/900mAh lithium battery *1 (built-in), sustainable working for 8 hoursOperating Temperature: -10~60Operating Humidity: Relative humidity 95% (without condensation)Size: Approx. 70 x 88 x 30mm / 2.8 x 3.5 x 1.2in(L x W x H)Application: Solar power monitoring system; Charging pile data acquisition and monitoring system; Intelligent agriculture, culture temperature and humidity, soil data acquisition and monitoring system; Unattended computer room data acquisition and monitoring system; Transformer safety, load, electricity metering monitoring system; Chemical plant anti-virus site data acquisition automatic control system; Hydrological data acquisition and monitoring system; Data acquisition and monitoring system for traffic, mining, meteorological and other occasions; Current, voltage, power, electricity consumption, temperature and humidity, wind speed, flow, pressure, liquid level and other data acquisition and monitoring system; ATM, POS, electricity meter, PLC, DAQ, inverter, inverter and other equipment data acquisition, monitoring and transmission; Smart grid, intelligent transportation, industrial automation, environmental protection data transmission and so on.Package List:1 x Alarm1 x Antenna1 x Power Adapter1 x Instruction