MusicCast - stream music expand sound to other MusicCast devices with a Wifi connection. MusicCast is compatible with Alexa-enabled devices. 7.2Channel 4K Ultra HD receiver provides Dolby Atmos and DTS:X surround sound. Bluetooth. Compressed Music Enhancer. Supports HDMI with 4K. HDR. AV Controller app. Cinema DSP 3D. YPAO Sound Optimization analyzes room acoustics. Rated output power: 115W. 4 HDMI inputs and 1 HDMI output. USB Input. Front USB and Mini-jack. Dimensions: 17.125”W x 6.375”H x 12.875”D.