Echo is a smart Speaker that can be controlled using your voice. It comes with Alexa voice service which can perform many other things.
Echo Voice Remote - Smart Accessory - Smartify Store
Choosing a voice assistant, Learning Module
Echo 4 Blue smart speaker integrated with Alexa virtual assistant., Meet Echo — Echo (4th Gen) connects to Alexa, a cloud-based voice service,
Alexa Echo 4 Blue
How to Smart-ify Your Home
Echo - Smart Voice Assistant - Smartify Store
Smart speaker Echo 4 Black integrated with Alexa virtual assistant., Meet Echo — Echo (4th Gen) connects to Alexa, a cloud-based voice service,
Alexa Echo 4 Black Anthracite
Echo Sub - Smart Voice Assistant- Smartify Store
How Voice-Activated Assistants Pose Security Threats in Home, Office
Echo - Smart Voice Assistant - Smartify Store