Amazon Echo Dot (3rd Gen) ? New and improved smart speaker with Alexa (White). With a new speaker and design, Echo Dot is a voice-controlled smart speaker with Alexa, designed for any room. Just ask for music, news, information, control compatible smart home devices and more. You can either use the crisp and clear built-in speaker or connect Echo Dot to your own other speakers using Bluetooth or 3.5mm audio cable.