The Xperia Ear Duo smart headset provides information and allows for listening to music without shutting out ambient noise or interfering with conversations. It turns on automatically when attached to the ear and adjusts the volume based on environmental sound levels. It includes a touch sensor and responds to voice commands. A particular highlight is the connection from earplug to drive unit, which is routed over the earlobe. In this way, the headset fits comfortably even when the user is wearing glasses.