Provides crisp dialogue with seamless audio/video sync to Roku TV or Roku home theater. Room-filling audio moves with the action and conversations. Auto lower loud commercials boost volume of voices and optimize sound for night listening. Stream audio from a connected Bluetooth device. No cables - just plug into power and wirelessly connect. Uses 802.11 dual-band Wifi. Each speaker has a 0.75" tweeter and 3.5" woofer. Comes with 2 power cables. Requires one of the following: Roku TV. Roku Streambar. Roku Streambar Pro. Roku Smart Soundbar.