The Denon AVR-X 3400H is an AV receiver that supports the latest audio and video formats, including Dolby Atmos and DTS:X. It offers 7.2 channel surround sound and has built-in Wi-Fi and Bluetooth for wireless connectivity. The receiver has multiple HDMI inputs and outputs, as well as advanced video processing capabilities. It also supports HDR (High Dynamic Range) video technology for enhanced picture quality. The AVR-X 3400H can be controlled through the Denon AVR Remote App, and it is compatible with popular voice control technologies like Amazon Alexa.