What kind of indicators change color upon exposure to moisture?

Liquid contact indicators are specifically designed to change color when they come into contact with moisture. This feature is particularly useful in various electronic devices and appliances, including Apple products, as it serves as a clear visual cue to indicate whether the device has been exposed to liquid, which can lead to damage or malfunction.

These indicators typically use a reactive dye that changes color upon exposure to water or humidity. This helps technicians and users quickly assess the potential for water-related damage, aiding in warranty claims or repair decisions.

In contrast, temperature indicators monitor heat levels but do not respond to moisture; power indicators show the status of the device's power but are unrelated to liquid exposure; battery indicators reflect battery status rather than moisture contact. Thus, the specificity of liquid contact indicators to moisture makes them the correct choice in this context.