RTU5023 GSM Temperature Humidity Environment Alarm Power Situation Remote Monitoring App Control

Features:
*Threshold exceeding alarm. When the temperature, humidity, power voltage exceed high threshold or low threshold value, will send SMS alert to up to 10 preset mobile phone immediately.
*Up to 10 authorized phone numbers, 5 can be used to receive call or SMS, and 5 can be used to call and SMS while alarm occurrence;
*No call charges for inquiry. The GSM Environment Alarm rejects the call from authorized number then return onsite temperature, humidity, and power voltage on the first 'ring';
*External AC Power status monitoring, AC On/OFF will send SMS to authorized phone numbers;
*Programmable by SMS Commands or Android APPs with password protec;
*Secure - Using caller ID and password for identification, unknown callers are ignored;
*Inbuilt MCU monitoring the DC input Voltage value, measure range is 9-24VDC, no need additional sensor to save cost;
*Timer Report—Can setup every x hours automatically send its status/value to the authorized numbers;
*Rechargeable backup battery inside can last 8 hours;
*Built-in buzzer led for environment alert;
*GSM Frequency: 850/900/1800/1900MHz;
*DC Power Supply: 9~24VDC, recommend 12V DC1A (not included);
*Sensor Range: Temperatures from -40-80°C (0.5°C accuracy), Relative Humidity from 0-99RH% (3% accuracy).