The Sonos Era 300 features Dolby Atmos spatial audio. The effect is hard to describe but essentially it sounds like the sound surrounds you. The Sonos Era 300 can connect via line-in (with adapter), Bluetooth or WiFi. Build quality is excellent! Two Era 300s can be paired to function as a stereo pair. Also, two Era 300s would make excellent rear speakers for a Sonos Arc soundbar! #Sonos #Era300 #Speakers #Unboxing