Google Alphabet said on Wednesday that he had made "an error" not to reveal that his home security system had a built-in microphone built in his devices.
Earlier this month, Google said that Nest Secure would receive up-to-date information and users could now enable their virtual assistant Google assistant on Nest Guard.
The device's published specifications did not mention a microphone, but the product page has been updated now mention one.
"The on-board microphone was never intended to be a secret and should have listed in the technical specifications. This was a mistake on our behalf. The microphone has never been implemented and it's only when users specifically enable the option, "Google said.
Firstly, Business Insider reported the news on Tuesday.
Nest, that Google bought for $ 3.2 billion in 2014, selling video door clubs, security cameras and thermostats that automatically customize settings based on user behavior.
The Nest alphabet, who had acted as an independent unit, combined in its Google hardware group last year.