When Google Assistant started work with its home security and alarm system Nest Secure, users didn’t know a microphone even existed on their Nest Secure devices to begin with.

The interesting part was that this was erroneously left out of the list of tech specs. It was in early February that Google announced an update to its home security and alarm system Nest Secure – it would be compatible with devices. But the users didn’t know that a microphone was a part of the Nest Secure devices, since the existence of the microphone was never disclosed in any of the product specifications.

But owning up to the error, a Google spokesperson recently told a media company that the on-device microphone is only activated when users specifically enable the option. Security systems often use microphones to provide features that rely on sound sensing. The mic is there on the device so that we can potentially offer additional features to the users in the future, such as the ability to detect broken glass, the spokesperson maintained.