Region Free UHD player with HDR (High Dynamic Range), HDR10, & Dolby Vision. This player has built-in support for the highest-quality surround sound formats, like Dolby TrueHD and DTS Master Audio. It also plays Dolby Atmos-encoded discs. You simply set the HDMI audio output to "bitstream" when connected to an Atmos-capable receiver. There are two HDMI outputs: one for sending audio to your home theater receiver and one for video directly to your TV. That means you can still play sound through receivers that don't have a free HDMI input that's HDCP 2.2 compatible. You can also use an optical digital connection to get surround sound from the player to your receiver. Dual Bank Wi-Fi for Smooth 4K video streaming Digital Optical Audio output 16-15/16"W x 1-13/16"H x 9-3/8"D LG UBKM9 Region Free Blu-ray Player