The Onkyo TX-NR686 7.2-Channel 4K A/V Receiver is a used home audio device that offers an immersive audio experience. It features DTS:X and Dolby Atmos surround sound formats, and audio inputs such as digital coaxial RCA, USB, and HDMI. The receiver combo also includes a radio tuner and HDMI audio outputs. With a sleek black design, this model is perfect for enhancing your home entertainment system.