Amazon Echo devices, like all of the best smart speakers, have revolutionized how we interact with technology. While most people are familiar with its voice-controlled features, such as streaming music, setting alarms, or asking questions to help complete your daily crossword puzzle, depending on the model, your Echo could be hiding a secret feature that you’re not familiar with.
A hidden ultrasound motion detector. That’s right, your Amazon Echo isn’t just listening to the commands you give it, it also has integrated technology that can sense if you’re in the room.
