Feature: 1. With functions of network failure, power failure and network cable fault alarm, supporting simultaneous monitoring of up to 7 network devices, and it can automatic restart and remote restart the network devices, which can help users quickly locate the offline reasons of remote network devices. 2. It can be configured by LAN connection software to facilitate user configuration, and can also be set and inquired by remote SMS instruction. Meanwhile, it supports connecting to the cloud platform through protocol or MQTT protocol to monitor terminal data in real time. When the wired network fails, it will automatically switch to cellular network to ensure that the terminal is always online. 3. Widely used, suitable for classrooms, public places, hospitals, stations, food warehouses, offices, factories, libraries, laboratories, etc., as well as any places that need to monitor the network and electricity. 4. Network failure monitoring, power failure monitoring and network cable monitoring, multiple monitoring of remote network equipment status. 5. Support simultaneous monitoring of 7 network devices, practical to use. 6. Built-in GSM GPRS module quad-band 850/900/1800/1900 Mhz. 7. 1 channel relay output for automatic restart or remote restart of network equipment. 8. Built-in microprocessor to monitor external voltage (0-36VDC), no need to purchase professional monitor voltage probe, saving money. 9. Support 10 authorized user numbers, can be customized to receive alarm calls, alarm/recovery SMS, periodic report SMS. 10. Daily fixed point or periodic automatic report of the current status to the user can be set. 11. Allows you to query 100 alarm history records by configured software or remote SMS. 12. Support RTU, TCP, MQTT protocol, support access to the cloud platform through the network realtime monitoring. 13. Wired network + cellular network communication, if the wired network fault automatic switch cellular network. 14. Version integration, with both Chinese and English versions, you can choice it according to your need. 15. Built-in rechargeable battery, in the case of power failure can continue to standby for 2-3 hours. 16. Simple installation, support wall mounting and DIN1.4in industrial guide mounting. Specification: Condition: 100% New Item Type: GSM Alert Operating Voltage: Standard Power Supply 12V DC, Support 9-36V DC Power Consumption: Normal Standby: 100ma@12V Maximum Power Consumption: 380ma@12V Communication Mode: Message Call, GPRS Wireless Cellular Network, Ethernet Wired Network Communication Protocol: RTU Over TCP Protocol, TCPM Protocol, MQTT Protocol GSM Frequency: 850/900/1800/1900MHz Network Interface:1 channel RJ45 network port, support DHCP dynamic access to IP or static fixed IP Relay Output:1 way normally closed relay output, contact capacity 7A/125VAC, 5A/250VAC, 20A/14VDC SIM Card Interface: Adaptive 1.8v or 3.0v SIM Card External Antenna: SMA Antenna Interface, 50 Ohms Built-in Battery: Rechargeable Lipo Battery: 3.7v /900mAh, can be standby for 2-3 hours Operating Temperature Range :-10-60 Operating Humidity Range: Relative Humidity 95% (No Condensation) Size(LxWxH): Approx. 70 x 88 x 30mm/2.8 x 3.5 x 1.2in Package List: 1 x GSM Alert1 x Power Supply1 x Antenna1 x Instruction