Apple on Thursday confirmed acquiring the Israeli startup Q.ai, in what appeared to be part of the tech giant’s efforts to make inroads into the wearables market, with the aid of artificial intelligence.

The purchase cost Apple almost $2 billion, people familiar with the terms told the Financial Times. Industry press said it was the second-largest acquisition in the company’s history, after its purchase of the Beats music giant in 2014.

Q.ai is tight-lipped in public about its technology, but patents it filed show tech being used in headphones or glasses using “facial skin micro movements” for nonverbal communication, according to the FT.

The move may be a component of Apple’s strategy for “wearable” products, such as smart glasses. Software that reads facial expressions could potentially make way for a hands-free user interface that doesn’t require talking out loud, reports noted.