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Amazon on Wednesday introduced the Amazon Echo Flex, a $25 (£25) plug-in smart speaker with a built-in Alexa speaker. It has an integrated USB port and optional Motion Sensor and Smart Nightlight ...

A new motion sensor incorporates micromachined thermal transistors to facilitate human presence and motion detection in security systems, home automation equipment, and Internet of Things (IoT) ...

As Amazon explains, some Alexa features rely on ultrasound motion detection in order to function. If you turn on an occupancy routine, your Echo will emit ultrasound waves and use the microphones to ...

Beginning this week, the newer models of Amazon's Echo and Echo Dot speakers will be able to make use of ultrasound capabilities to detect occupants within the user's home and turn on or off connected ...

Most smart homes already have at least nine powerful features quietly sitting in the Alexa, Google Home, Apple Home, Roku, ...