Product Features Operate anywhere, without distance limitations. Supports up to 200 authorized phone numbers. The first three numbers receive SMS alerts, while numbers four to six receive calls during alarms. Authorized numbers (1-200) can control Relay0 by calling T201. External AC/DC power status monitoring. Power changes trigger SMS alerts and calls to six preset numbers. Customizable timer reports for periodic status updates via SMS to six mobile phones. Remote access to historical data via SMS. Automated system links to Relay1 for status-based actions (temperature or power supply changes). Alarm output activation for 30 seconds upon alarm occurrence. Internal rechargeable battery supports up to six hours of operation. Security features include caller ID and password protection, ignoring unknown callers. Program with SMS commands using password protection. Compatible with various applications: temperature, power status, solar panels, and DC voltage. Installation Tips Read the user manual thoroughly before setup. Conceal the system during installation. Prevent water exposure to control unit. Ensure main power connection is secure. Specifications Product Name Monitoring Relay Rated Voltage DC 9V~24V / 1A Working Temperature -10℃~+60℃ Storage Temperature -20℃~+60℃ Relative Humidity 10-90%, No Condensation Working Frequency GSM: 850/900/1800/1900MHz; 3G WCDMA: 900/2100 MHz UMTS; 3G CDMA2000: 850/1900MHz UMTS; 3G: 850/2100MHz UMTS Communication Protocol GSM PHASE 2/2 + (including data service) Relative Voltage of Output Relay 3A / 240V AC SIM Card Nano type, 3V Antenna 50Ω SMA Wired Switch Support Temperature Sensor Temperature: -55℃~+125℃; ±0.1℃ Alarm Output Output Voltage = DC Input Voltage, Current: < 1A Backup Battery 3.7V / 1000mAH (Optional) Material ABS Item Size Approx. 8.8 * 7.3 * 6 cm / 3.5 * 2.9 * 2.4 in Package Information Package Size: Approx. 12.5 * 9.3 * 7 cm / 4.9 * 3.7 * 2.8 in Package Weight: Approx. 215g / 7.6oz Note Please allow 0-1cm error due to manual measurement. Ensure compatibility before purchasing. Due to monitor differences, the item's color may vary in person. Package List 1 x GSM Temperature Alarm Relay 1 x Temperature Sensor 1 x User Manual (QR Code)
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