The UB820 4K Ultra HD Blu-ray Player features our unique chroma processing technology to maximise the beauty of 4K/HDR content, built-in wi-fi with a full smart networking suite that supports 4K streaming, and a 7.1-channel analogue audio output for lifelike surround sound. Panasonic's 4K PRO HDR model Ultra HD Blu-ray Player features an HCX Processor for Ultra HD Blu-ray packed with original imaging technologies for stunning picture quality. The precise colours and HDR reproduction that form the essential elements of Ultra HD are the basis of high-definition images. They bring you a whole new viewing experience that you've never had before.Supporting HDR10, HDR10+ dynamic metadata and Dolby Vision HDR formats, this UHD player will bring the very best out of your home entertainment experience.Tone mapping is used to adjust the brightness level of the content. And even HDR images from ordinary HDR10 and TV footage, which do not support special new formats like HDR10+ and Dolby Vision, provide optimal playback.