Multifunctional thermal and smoke detector. It includes a PIR sensor, temperature sensor and emergency light. Reflective photoelectric sensor to detect smoke from any source, especially smoldering fires. Detection of heat rise when the temperature exceeds 57.25°C or increases 8.25°C per minute. Self-calibration every month to reset the detection threshold value. Self-diagnosis function to ensure optimal performance. 85dB siren for audible alert. Random monitoring signals to verify system integrity. Built-in PIR sensor detects movements and supports creating scenes. The built-in temperature sensor measures the ambient temperature. Built-in emergency light to provide visual alerts. Alarm silence button. LED status indicators for visual notification. Low battery detection. RF Frequency: 868MHz. It is powered by 3 CR123 lithium batteries. Sound power: 85dB at 3 meters. Temperature detection range: -10°C ~ +50°C. Temperature sensitivity: ±1°C. PIR detection range: 8 meters radius installed at 3 meters high. Operating temperature: -10°C ~ +45°C.