What type of information do the annunciators display?

The correct answer focuses on the specific role of annunciators within aircraft systems. Annunciators are designed to provide clear and immediate information relating to the operational status and performance of armament systems. This includes displaying polarity, which indicates the electrical state of the system; battery condition, which informs personnel about the health and status of the battery; and measurement mode, which shows the current configuration of the device in use (whether it's set for certain types of measurements).

This combination of information is crucial for ensuring that personnel can quickly assess and respond to operational needs. Understanding the state of the battery and polarity helps avoid malfunctions, while knowing the measurement mode allows users to interpret data accurately and effectively during operations.

In contrast, the other options describe information that does not align with the primary functions of annunciators in employing immediate and relevant system status updates. For example, weather conditions and input voltage, battery life and last measurement taken, or calibration data and connector type do not provide the same direct indicators of system performance that are vital to the operation of aircraft armament systems.