Remote monitoring alarm for temperature and humidity via SMS and GSM, indoor thermometers, temperature alarm, and power outage alert

Features: 1. One temperature sensor input, temperature measurement range: -55°C to 125°C, accuracy: 0.1°C. 2. Supports timer reporting; it can be configured to automatically send its status/value to 6 predefined mobile phones every x hours. 3. Supports remote reading of historical data via SMS. It can be programmed via SMS commands with password protection. 4. Using caller ID and password for authentication, unknown callers are ignored, ensuring secure operation. 5. Based on GSM networks, it is suitable for numerous applications (temperature, humidity, power status, solar panels, DC voltage). Specification: Condition: 100% Brand New Item Type: Temperature Alarm Material: ABS Color: As the picture shown Rated Voltage: DC 9V-24V/1A Operating Temperature: -10℃-+60℃ Storage Temperature: -20℃-+60℃ Relative Humidity: 10-90%, No Condensation Working Frequency: GSM: 850/900/1800/1900 MHz Communication Protocol: GSM PHASE 2/2+ (including data service) Output Relay Relative Voltage: 3A / 240V AC SIM Card: 3V Nano Antenna: 50ΩSMA Wired Switch: Supported Temperature Sensor: Temperature: -55-125°C, Accuracy: 0.1°C Siren Output: Output Voltage = DC Input Voltage, Current: <1A Backup Battery: 3.7V/1000mAh (Built-in) Size: Approx. 96.5 x 72 x 59 mm / 3.8 x 2.8 x 2.3 inches. Package list: 1 x Temperature alarm, 1 x DS18B20 temperature probe, 1 x Antenna, 2 x Terminal packs, 1 x Instruction manual