At Amazon's hardware event, the online retailer announced new editions of the Echo smart speaker and several updates to the smaller Echo Dot. All of these devices sport new spherical designs and are available for preorder now. They're slated for release on October 22. Preorder Amazon Echo and Echo Dot [poilib element="commerceDeal" parameters="slug=4th-gen-echo-and-dot"] What's new in these fourth-generation Echo devices?