QE55QN85FAUXTK Key Features Resolution Format 4K Resolution (3840x2160) Screen Size 55 Inch Image Technology Neo QLED Operating System Tizen Refresh Rate 144 Hz Broadcasting Support Satellite Receiver Yes Sound Features Audio Output Power (RMS) 40 W Dolby Digital Yes Dolby Atmos Yes Sound Features Adaptive Sound, Object Tracking Sound (OTS Lite), Q-Symphony Image Features Mini LED QLED with Quantum Dot Quantum Mini LED Quantum Dot Display Pantone Validated Quantum Matrix Technology Ultimate UHD Dimming DCI-P3 100%, HGIG Mode Motion Xcelerator 120Hz NQ4 AI Gen2 Processor 4K Real Depth Enhancer Wide Viewing Angle 4K AI Upscaling HDR Ambient Mode Game Mode Connection Options Number of USB Ports 2 Number of HDMI Inputs 4 Optical Audio Output Yes Ethernet Yes Device Dimensions Width (with feet) 122.76 cm Height (with feet) 76.12 cm Depth (with feet) 24.74 cm