Yamaha RX-A860BL 7.2 Channel Network AV Receiver, Works with Alexa Works with Alexa for voice control (Alexa device sold separately) 4K Ultra HD video upscaling with HDCP 2.2, HDR and BT.2020 support Dolby Atmos and DTS:X surround sound processing (5.1.2-ch) Built-in Wi-Fi, Bluetooth, AirPlay, Spotify Connect, Pandora, Rhapsody, SiriusXM Internet Radio, vTuner, PC / NAS MusicCast wireless multi room audio compatible Room acoustics optimization using YPAO - R.S.C. with multipoint measurement