1、Remotely monitor the temperature, humidity and power status of the site through the wireless GSM network. When the temperature, humidity, and power status exceed the high or low threshold, it will immediately send SMS reminders or call 6 preset mobile phones. 2、When the temperature and power alarm are normal, it can be linked to the Realy 1 output action, which is very useful when the temperature exceeds the specified value, the air conditioner needs to be turned on immediately or the water overflows and the dryer needs to be turned on. 3、Relay 0 with dial‑up or SMS remote control. Since the call is not answered, the dial‑in control in GSM is free. (It only checks the caller's number, and if the number is authorized, it responds via relay activation.) 4、Up to 200 authorized phone numbers. The first to third user numbers can receive text messages, and the fourth to sixth user numbers can answer calls when an alarm occurs. 1~200 authorized phone numbers can dial T201 to open/close Relay0 for free. 5、Can be used for parking latch control, GSM door opener, remote control machine, etc. Based on the GSM network, it is suitable for many applications. (Temperature, power status, solar panel, DC voltage). Item Type: GSM Temperature Alarm Material: ABS Uses: Suitable for vegetable greenhouses, home temperature detection and power monitoring Rated Voltage: DC 9V - 24V / 1A Operating Temperature: -10℃ - +60℃ Storage Temperature: -20℃ - +60℃ Relative Humidity: 10 - 90%, no condensation Operating Frequency: GSM: 850/900/1800/1900MHz Communication Protocol: GSM Phase 2/2 + (including data services) Relevant Voltage of Output Relay: 3A / 240V AC SIM Card: Nano type 3V Antenna: 50Ω SMA Cable Switch: Support Temperature and Humidity Sensor: Temperature: -55 - +125°C Accuracy: 0.1℃ Alarm Output: Output voltage is DC input voltage Current: <1A 1 x GSM Temperature Alarm 1 x Temperature and Humidity Probe 6 x Connect Terminal 1 x Antenna 1 x Description