For the first time, Echo Dot is powered by AZ3, Amazon’s custom-designed silicon, enabling advanced on-device processing for faster, more natural conversations with Alexa+. With the addition of a fourth microphone, Alexa can better hear you as you move around the room, even in busy environments—so Voice ID can recognize who’s speaking and personalize your experience, like playing your favorite playlist instead of your partner’s. And with Omnisense, our custom sensor fusion platform, Echo Dot can sense the environment around it, detecting things like room temperature and presence so Alexa can make your home more responsive—turning up the thermostat when the room is too cold, or turning on the lights as you walk in.
https://www.aboutamazon.com/news/devices/echo-speaker-lineup



