All Amazon Echo speakers are capable of the same core actions, as they're powered by Alexa in the cloud. It's how they deliver the results that count, and that's what we test. We speak to all smart speakers in a variety of locations and with differing amounts of background noise, to see how well the microphones work. To test audio quality, we put all of our speakers through the same playlist, listening to how they sound with different genres. We test at different sound levels, too, so we can see how sound quality changes as the volume goes up. For smart displays, we test using video from Netflix and Prime Video, plus we make video calls to see what the webcam is capable of. All smart speakers ar connected to a range of smart devices, and we test the ability to control them with voice or, in the case of the Show devices, on-screen controls