What technology is used in temperature alarm cameras to set detection zones?

Temperature alarm cameras utilize temperature monitoring technology to set detection zones effectively. This technology allows the camera to monitor specific temperature thresholds within designated areas, triggering alerts when these thresholds are exceeded or not met. By setting these detection zones, users can focus on particular regions of interest, enhancing the camera's ability to detect anomalies or conditions that require attention, such as overheating equipment in a server room or areas that are prone to freezing temperatures.

The other options do not serve the function of setting detection zones in the context of temperature alarm cameras. Audio input relates to sound detection rather than temperature changes. Zoom capability enhances the visual focus of a camera but does not contribute to temperature detection. Video analytics may involve processing visual data for various actions but primarily focuses on movement or behavior rather than temperature monitoring specifically.