In original packaging and closed box Full-range driver and dual passive radiators for deep bass and crisp high frequencies Custom acoustic waveguide for a 360º sound field Acoustically transparent fabric Computational audio for real-time tuning Four-microphone design for far-field Siri Sound Recognition for smoke and carbon monoxide alarm sounds2 Multiroom audio with AirPlay3 Stereo pair capable4 More Details https://www.apple.com/homepod-mini/specs/