Hisense 75" 4K UHD Digital Signage Display (HISENSE 75B4E30T) - Resolution: 3840 x 2160, Contrast(typ): 1200:1 (typ), Brightness: 500 nits (typ), Refresh rate: 60HZ, Built in speaker: 10W x 2, Connectivity: WIFI: 2.4G/5G, LAN: 10/100Mbps, TF Card: TF x 1, Operating System: OS: Android 8.0, VESA: 400mm*400mm