VOICE CONTROL SMART GLASSES: Speaker with Smart Assistant Technology Like Hand Free Phone Calling and Answering, Easily Speak Siri,Cortana and Google Now to Connect to Your Favorite Music Stations (Pandora,iTunes,Spotify and more),Easily Speak for Directions, Weather and Traffic Updates Audio Glasses is with Volume Up and Down Feature as Well as Forward and Backward, Battery Playing Lead Time is up to 10 Hours