Sonos One black

Power supply
Auto-switching 100-240 V, 50-60 Hz AC universal input.
  
WiFi, not Bluetooth
Connects to your home WiFi network with any 802.11b/g, 2.4 GHz broadcast-capable router for uninterrupted wireless streaming.
  
Ethernet port
One 10/100 Mbps Ethernet port. Wire directly to your router to operate your Sonos if WiFi is unstable, or use the Ethernet port to provide Internet accessibility to non-wireless devices if you’re using Boost setup.

Two Class-D digital amplifiers perfectly tuned to match the speaker drivers and acoustic architecture.
 
One tweeter creates a crisp and clear high-frequency response.
 
One mid-woofer ensures you’ll hear the faithful playback of mid-range vocal frequencies plus deep, rich bass.
 
Adjustable bass and treble controls let you customise your sound by individual room or groups of rooms.
 
Far-field microphone array, used for smart voice capture and noise cancellation.