The Polk Command Bar – The Home theater sound bar system with Alexa built in. Integrated far field microphones and Alexa voice services Use your voice to control the sound bar With Amazon Multi Room Music and the Polk Command Bar, play and control your music across multiple Amazon devices. Ask Alexa to stream your favorite song, and hear it throughout your Home Patented Voice Adjust technology for crystal clear dialogue Wireless subwoofer for deep bass 4K HDMI ports Fully compatible with Fire TV (sold separately) Includes HDMI and Optical cables for quick and easy setup.