* It can be operated anywhere, and no distance limit.
* Up to 200 authorized phone numbers. The 1st ~3rd user numbers can receive SMS, and the 4th ~6th user numbers can receive calls when alarm occurs. 1~200 authorized phone numbers can call T201 to turn on/off the Relay0.
* External AC/DC power status monitoring, AC/DC power on/off will send SMS and immediately call 6 preset mobile phones.
* Timer report can be set every few hours, and its status/value will be automatically sent to 6 preset mobile phones immediately.
* Support remote reading of historical data via SMS.
Features:<br/>* It can be operated anywhere, and no distance limit.<br/>* Up to 200 authorized phone numbers. The 1st ~3rd user numbers can receive SMS, and the 4th ~6th user numbers can receive calls when alarm occurs. 1~200 authorized phone numbers can call T201 to turn on/off the Relay0.<br/>* External AC/DC power status monitoring, AC/DC power on/off will send SMS and immediately call 6 preset mobile phones.<br/>* Timer report can be set every few hours, and its status/value will be automatically sent to 6 preset mobile phones immediately.<br/>* Support remote reading of historical data via SMS.<br/>* Automation system, when the temperature, power supply alarm or normal, it can link to Realy1 for operation.<br/>* Alarm output, when alarm occurs, it will output for 30 seconds.<br/>* Internal rechargeable battery can be used continuously for 6 hours.<br/>* Safe, use caller ID and password for identification, unknown callers will be ignored.<br/>* It can be programmed via SMS commands with password protection.<br/>* Based on GSM web, suitable for many applications. (Temperature, power status, solar panels, DC voltage).<br/> <br/>Tips:<br/>1. Please read the user manual carefully before installing and setting up the control unit.<br/>2. Install the system in a hidden place.<br/>3. Avoid pouring water into the control unit.<br/>4. Ensure that the connection to the main power supply is secure.<br/> <br/>Specifications:<br/>Product name: Monitoring Relay <br/>Rated voltage: DC 9V~24V / 1A<br/>Working temperature: -10℃~&#43;60℃<br/>Storage temperature: -20℃~&#43;60℃<br/>Relative humidity: 10-90%, no condensation<br/>Working frequency:<br/>GSM: 850/900/1800/1900MHz<br/>3G WCDMA: 900/2100 MHz UMTS<br/>3G CDMA2000: 850/1900MHz UMTS<br/>3G: 850/2100MHz UMTS<br/>Communication protocol: GSM PHASE 2/2 &#43; (including data service)<br/>Relative voltage of output relay: 3A / 240V AC<br/>SIM card: Nano type, 3V<br/>Antenna: 50Ω SMA<br/>Wired switch: support<br/>Temperature sensor:<br/>Temperature: -55℃~&#43;125℃:0.1℃<br/>Alarm output: output voltage &#61; DC input voltage, current: &lt;1A<br/>Backup battery: 3.7V / 1000mAH (without Battery)<br/>Material: ABS<br/>Item Size: Approx. 8.8 * 7.3 * 6cm / 3.5 * 2.9 * 2.4in<br/><br/>Package Information:<br/>Package Size: Approx. 12.5 * 9.3 * 7cm / 4.9 * 3.7 * 2.8cm<br/>Package Weight: Approx. 215g / 7.6oz<br/><br/>Note:<br/>Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.<br/>Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!<br/> <br/>Package List:<br/>1 * GSM Temperature Alarm Relay<br/>1 * Temp Sensor<br/>1 * User Manual(QR code)