When you use the video calling application, open the settings (*) of the video calling application, and check that the speaker or microphone setting is specified as [Headset (LinkBuds S Hands-Free)](**). When the settings of the video calling application cannot be checked or calling connections [Headset (LinkBuds S Hands-Free)] cannot be selected, select [Headset (LinkBuds S Hands-Free)] on the settings of your computer to make connections.