Host productive meetings and write in any document with the best digital ink on the market using the SMART Board(R) MX Pro series. A fantastic solution for any team who want an interactive display that integrates with both Microsoft and Google environmentsDisplayScreen Sizes (diagonal) 55" / 65" / 75" / 86"Backlight LEDAspect Ratio 169Maximum Display Resolution 4K UHD (3840 x 2160)Refresh Rate 60 HzSpeakers 55" 2 integrated 15 W speakers 65", 75", 86" 2 integrated 20 W speakersMicrophone Integrated linear six-microphone array with support for onboard acoustic echo cancellation