1.Wide working voltage, support 9-36V DC power supply, with anti-reverse protection design; 2. Built-in industrial grade ARM CortexTM core, high performance, stable and reliable; 3. Quad band 850/900/1800/1900Mhz GSM GPRS Module inside. 4. 3G/4G/NB-IoT Modules are optional; 5. Modular design, can easily upgrade the cellular module if network upgrade; 6.Support 1 channel relay output for restart the devices; 7.Supports 1 channel RJ45 Ethernet port, built-in isolation transformer, up to 2KV electromagnetic isolation; 8.Up to 10 user's phone number to receive alarm and daily report SMS/Call; 9. Support monitoring power supply status and max. 7 network devices monitoring simultaneously; 10. Built-in TCP/IP protocol stack, support transparent transmission and Modbus RTU to Modbus TCP Protocol; 11.Inbuilt large capacity automatically rechargeable backup battery; 12. Industrial class design suitable for long time work applications; 13. Support configure parameters, load profiles and upgrade the firmware via PC; 14. Wall mount or 35mm standard DIN rail Design, convenient installation, 15. Metallic cover, small size, exterior dimension is L70*W88*H30mm.