Amazon Echo is a voice-activated, cloud-connected speaker for your living room. With seven microphones embedded in the top of its 9.25-inch, tower-like design, it promises to hear you from anywhere in the room -- ask it to stream your favorite music, ask it to set an alarm, or ask it for information, and it promises to respond in kind. Amazon claims that you can put its speaker anywhere in the room and still talk to it without needing to shout. To wake it up, you'll address it as "Alexa," the system's wake word. From there, simply give it a command or ask it a question.