Features: x It can be operated anywhere, and no distance limit. x 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 or off the Relay0. x External AC or DC power status monitoring, AC or DC power on or off will send SMS and immediately call 6 preset mobile phones. x Timer report can be set every few hours, and its status or value will be automatically sent to 6 preset mobile phones immediately. x Support remote reading of historical data via SMS. x Automation system, when the temperature, power supply alarm or normal, it can link to Realy1 for operation. x Alarm output, when alarm occurs, it will output for 30 seconds. x Internal rechargeable battery can be used continuously for 6 hours. x Safe, use caller ID and password for identification, unknown callers will be ignored. x It can be programmed via SMS commands with password conservation. x Based on GSM web, suitable for many applications. (Temperature, power status, solar panels, DC voltage). Tips: 1. Please read the user manual carefully before installing and setting up the control unit. 2. Install the system in a hidden place. 3. Avoid pouring water into the control unit. 4. Ensure that the connection to the main power supply is secure. Specifications: Product name: Monitoring Relay Rated voltage: DC 9V-24V or 1A Working temperature: -10-and60 Storage temperature: -20-and60 Relative humidity: 10-90 percent , no condensation Working frequency: GSM: 850 or 900 or 1800 or 1900MHz 3G WCDMA: 900 or 2100 MHz UMTS 3G CDMA2000: 850 or 1900MHz UMTS 3G: 850 or 2100MHz UMTS Communication protocol: GSM PHASE 2 or 2 and (including data service) Relative voltage of output relay: 3A or 240V AC SIM card: Nano type, 3V Antenna: 50 SMA Wired switch: support Temperature sensor: Temperature: -55-and125:0.1 Alarm output: output voltage = DC input voltage, current: