The Echo is a cylindrical speaker that is nearly spherical in shape. It is available in black, blue, or white and has a blue light ring around the top that lights up when you say the Alexa wake-word “Alexa.” ..
The new Echo Show is a sleek and stylish speaker that offers great sound quality. The back of the speaker has three buttons for Alexa, volume and mic mute. The ellipse on the back of the speaker is at its highest point, meaning that it doesn’t produce great omnidirectional sound.
The Echo Plus and Echo 3rd Gen are the same size, but you now get two tweeters. The purpose of the second tweeter is to help you set up new devices quickly and extend the working range of things, such as Ring Smart Lighting, that may be beyond the capabilities of your home wi-fi.