The umbrella corporation of Google Alphabet Inc Quietly Buys U.K. Sound Tech Startup Redux.

Redux built technology that uses vibrations to turn surfaces of phones or tablets into speakers or provide haptic feedback. Redux was founded in 2013 out of Cambridge.

Redux developed technology that eliminates the need for small speakers in mobile phones, freeing up space for batteries or other components, the Cambridge, U.K.-based startup said on its now defunct website.

Alphabet has a range of potential uses for the technology. Its main Google division started selling its own smartphones in 2016, so new engineering talent from Redux may help the company develop handsets with better sound. Redux’s technology could also be used create haptic feedback — which gives the sense of touch on a surface such as a screen. At the CES consumer electronics conference in Las Vegas this week, Google is heavily promoting its voice-controlled speakers that compete with Inc.’s Echo device.

Redux is led by its CEO Nedko Ivanov, formerly CEO of BullGuard, John Kavanagh who hails from IBM and CapGemini, David Gammie, who has formerly at Plastic Logic, and Nimrata Boora who came from Deloitte and then HiWave Technology.

It is unclear when Alphabet — via an Ireland-based subsidiary of Google — acquired Redux, but the transfer of shares of Redux holding company NVF Tech Ltd. to the U.S. tech giant was confirmed on Dec. 13, according to U.K. regulatory filings. Crunchbase said the deal happened in August.