Onkyo TX-NR737 7.2-Ch Network A/V Receiver w/ HDMI 2.0 (Certified Refurbished) This Certified Refurbished product is tested & certified by Onkyo to look and work likenew. The product includes all original accessories, and is backed by a 1 year warranty. THX certification guarantees the same highvolume, lowdistortion sound of a commercial multiplex theater in your own listening space, with highresolution studiomaster soundtracks reproduced precisely as the director intended. Five of the receiver's seven HDMI inputs are based on the latest HDMI 2.0 specification to support 4K video at 50/60 frames per second and 21:9 aspect ratio for theaterreference movie display. The Onkyo TXNR737 doubles the power with two 32bit processing engines handling multichannel studiomaster soundtracks along with a large variety of hires audio files, including 5.6 MHz DSD (the same format used for Super Audio CD). The TXNR737 has WiFi and Bluetooth technology built in. For network audio, use the remote app to stream music stored on your smartphone and to locate and stream hires audio from any networkattached DLNAcertified device (such as a PC or NAS).