Harman Kardon Astra is a voice-activated speaker powered by Amazon Alexa Voice Service. Its 360°chrome ring with diffused light effect, together with a fully customized metal grille ensures a premium look and feel. Its intelligent proximity sensor lights up the control button only when the user approaches and the result is a modern and subtle design that fully blends into your home environment. Astra is hands-free and controlled by voice commands. Just ask Alexa to play music, read the news, control a smart home, make purchases from Amazon Prime, and more. With 360-degree sound, you can also stream room-filling music via Bluetooth.