1Remotely monitor on-site temperature and power status through wireless GSM network. When the temperature and battery status exceed the high or low threshold, an SMS reminder or call will be sent to 6 preset mobile phones immediately. 2 Automation system. When the temperature and power supply are alarming and normal, the Realy1 output action can be linked, which is very useful when the temperature exceeds the specified value and the air conditioner needs to be turned on immediately, or the dryer needs to be turned on when water overflows. 3A Relay 0 with dial-in or SMS remote control. Maximum 200 calls. You can authorize the number for it. Incoming control within GSM is free since calls are not answered. (Only check the caller number, if the number is authorized, the response relay is activated.) Can be used for parking lock control, GSM door opener, remote control, etc. 4 alarm output, when an alarm occurs, it will be output for 30 seconds. Site environment can be reported regularly. 5 can be operated anywhere without distance restrictions. Internal rechargeable backup battery provides 6 hours of use. 6Maximum 200 authorized phone numbers. User numbers 1-3 can receive text messages, and user numbers 4-6 can answer calls when an alarm occurs. You can dial T200 from the 1200 authorized phone number to turn on/off Relay0 for free. 71 temperature sensor inputs, temperature measurement range: 55125C, accuracy: 0.1C. 8 external AC/DC power status monitoring, AC/DC power on/off will immediately send text messages and call 6 preset mobile phones. 9. Supports scheduled reports, and can be set to automatically send its status/value to 6 preset mobile phones every x hours. 10Supports remote reading of historical data via SMS. It can be programmed via SMS commands with password protection. 11 Use the caller number and password for identification. Unknown calls will be ignored, making it safe to use. 12Based on GSM network, suitable for a variety of applications. (temperature, humidity, power status, solar panels, DC voltage). Condition: Product type: Temperature alarm Material: ABS Color: As shown in the picture Rated voltage: DC 9V-24V / 1A Working temperature: -10 - +60℃ Storage temperature: -20℃ - +60℃ Relative humidity: 10- 90%, non-condensation Operating frequency: GSM: 850/900/1800/1900MHz Communication protocol: GSM PHASE 2/2+ (data services included) Output relay relative voltage: 3A/240V ACSIM card: Nano 3V Antenna: 50SMA Wired switch: Support temperature sensor: Temperature: -55-125C, Accuracy: 0.1C Siren output: Output voltage = DC input voltage, current: