3D surround sound with DTS Virtual:X || Clear Voice mode makes movie dialogue stand out and easier to hear. Alexa voice control compatibility* (*Availability varies by region) || Music streaming services built-in. MusicCast multi-room technology || Wireless subwoofer. Ability to add wireless surround sound speaker/s* (*MusicCast 20 or MusicCast 50) || High-Resolution Audio. Qualcomm DDFA digital amplifier technology || HDMI (ARC), optical, aux input, Ethernet connectivity.