Onkyo TX-NR636 7.2-Ch Dolby Atmos Ready Network A/V Receiver w/ HDMI 2.0 (Certified Refurbished) This Certified Refurbished product is manufacturer refurbished, shows limited or no wear, and includes all original accessories plus a 1 year warranty Five of the receiver's seven HDMI inputs support 4K video at 60 frames per second Now you can add thunderous 7 2-channel surround-sound to the latest blockbuster 4K/60 Hz games and movies for a breathtakingly realistic entertainment experience The Onkyo TX-NR636 doubles the power with two 32-bit processing engines decoding multichannel studio-resolution soundtracks along with a huge variety of HD audio files, including 5 6 MHz DSD (the same format used for Super Audio CD) Built-in Wi-Fi and Bluetooth The remote app streams any music stored on your device, will locate and stream HD audio from network-attached devices The Advanced Music Optimizer restores compressed Bluetooth audio files to close to their original fidelity AccuEQ by Onkyo simplifies the initial home theater setup process and makes both surround sound and two-channel audio more cohesive and realistic in your listening space