Nano Cell technology Nano Cell technology allows the screen's pixels to be placed much closer together. This is perfect for getting the best from your 4K content, as you'll see precise detail and subtle highlights you might otherwise miss. It also makes colours consistent across the whole screen - perfect for gaming or watching animated films. Multi HDR High Dynamic Range (HDR) allows the SJ81 to display a much more expansive range of colours over other TVs. You can expect deep blacks and bright highlights without a muddy middle ground. It supports a wide range of HDR formats including HDR 10 and Dolby Vision, using Active HDR to master images - expect only the best images thanks to this advanced technology. Smart features You can always catch up on your favourite or missed programmes thanks to the SJ81's Smart features. It has all of the terrestrial services built-in, so you don't need to connect any other devices to watch what you want to. Freeview Play Freeview Play makes finding things to watch and catching up on missed programmes easy. Just scroll back up to eight days in the programme guide and click the show you want to open it using one of the catch-up apps.