The high-performance AVR-2113CI lets you enjoy the exciting surround sound of the latest 3D videos in a 7.1-channel home theatre. It also includes advanced video circuitry that upscales high-definition (HD) signal to a 4K (3840 x 2160 pixel) signal. The AVR-2113CI further provides advanced network functions that let you listen to Internet radio or play music files stored on a PC. Since AirPlay® is also supported, you can listen to music content from the iTunes® library on your iPad®, iPhone®,iPod touch®, or PC/Mac via the network. In addition, if you download the new Denon Remote App to your iPad, iPhone, or Android smartphone, you can use those devices to operate the main controls on the AVR-2113CI. The AVR-2113CI is even equipped with the multi-room audio function that lets you assign 2 of the amplifier’s 7 channels to use with speakers in another room.