Amazon Echo is a wireless speaker and voice command device from Amazon.  The device consists of a 9.25-inch tall cylinder speaker with a seven-piece microphone array.  

The device responds to the name "Alexa." This "wake word" can be changed by the user to either "Amazon" or "Echo." The device is capable of voice interaction, music playback, making to-do lists, setting alarms, streaming podcasts, playing audiobooks, and providing weather, traffic and other real-time information. It can also control several smart devices.