The Polk Command Bar-the home theater sound bar system with Alexa built-in. With integrated far-field microphones and Alexa voice services, use your voice to control the sound bar, your smart home devices and stream music-Just Ask. Features patented Voice Adjust technology for crystal clear dialogue, a wireless subwoofer for deep bass and 4K HDMI ports. Plus, its fully compatible with Fire TV (sold separately). Includes HDMI and optical cables for quick and easy setup.