DISPLAY Type 4K OLED Screen Size 55" Resolution 3840 x 2160 Wide Viewing Angle Yes Color / Wide Color Gamut Perfect Color Color display bits / Billion Rich Colors Yes Contrast / Perfect Black Perfect Black Contrast / Dimming Pixel Dimming Contrast / Ultra Luminance Ultra Luminance Pro Motion / Refresh Rate Refresh Rate 50Hz Platform Main Processor (SoC) α7 Gen4 Processor 4K (LM21U) Operating System (OS) webOS Smart TV Number of CPUs Built-In Video and Picture Quality AI Picture / Pro AI Picture Face Enhancing + Body/Object (8K Only) AI Picture - Face Enhancing AI Upscaling AI Upscaling Auto Genre Selection Yes (Dolby HDR) Image Enhancing Image Enhancing AI Brightness Control Yes HDR Cinema HDR Dolby Vision IQ Yes/Yes/Yes (4K/2K) HDR10 Pro Yes/Yes/Yes/Yes (4K/2K) HLG Yes/Yes/Yes/Yes (4K/2K) FILMMAKER MODE™ Yes Dynamic Tone Mapping / Pro (+ AI HDR Tone Mapping) HDR Dynamic Tone Mapping Upscaler 4K Upscaler HEVC 4K@60p, 10bit VP9 (Video Decoder) 4K@60p, 10bit AV1 (Video Decoder) 4K@60p, 10bit HGIG Mode Yes Instant Game Response (VRR/ALLM) -/Yes Picture Mode Yes 9 modes (Vivid, Standard, Eco, Cinema, Sports, Game, Filmmaker, (ISF)Expert(Bright Room), (ISF)Expert(Dark Room)) Audio and Sound Quality Speaker (Sound Output) 20W (10W per Channel) Channel 2.0ch Direction Down Firing Simultaneous Audio Output Yes (Optical Output or HP Support Model) DOLBY ATMOS Yes AI Sound / Pro AI Sound AI Acoustic Tuning Yes Surround mode => 21Y Spec Out OLED Surround Clear Voice Clear Voice III Bluetooth Surround Ready Yes WiSA Speakers Yes (WiSA 2.1ch) LG Sound Sync Yes Sound Share Yes Audio Codec AC4, AC3(Dolby Digital), EAC3, HE-AAC, AAC, MP2, MP3, PCM, WMA, apt-X (Refer to manual) Sound Mode Sync Yes Sound Alive Yes AI Smart Function ThinQ Yes Intelligent Voice Recognition Yes Speech to Text Yes LG Voice Search Yes AI UX Yes AI Home Yes AI Recommendation Yes Intelligent Edit Yes Home Dashboard Yes Apple Homekit Yes Mobile Connectivity Yes Screen Share Yes ThinQ App Yes Airplay2 Yes Next Picks (AI Channel) Yes Magic Explorer(AI Link) Yes Magic Remote Control Built-In Quick Access Yes Universal Control Yes 360° VR Play Yes Related Content Search Yes Art Gallery Yes LG Store Yes DIAL Yes Web Browser Yes Music Player -> Media Player Yes TV On With Mobile Yes Wi-Fi TV On Yes Bluetooth Low Energy On Yes Network File Browser Yes Block access to harmful site Yes Hotel Mode Yes Sports Alert Yes Music Discovery Yes Broadcasting Digital TV Reception(Terrestrial,Cable,Satellite) Yes Terrestrial DVB-T2 Cable DVB-C Satellite DVB-S2 Analog TV Reception Yes Teletext Page Yes Teletext (Top/Flof/List) Yes [DVB] Subtitle Yes AD (Audio Description) Yes EPG (8days) Yes CONNECTIVITY HDMI 1 (Rear)/2 (Side) Version HDMI 2.0 Simplink (HDMI CEC) Yes eARC / ARC (Audio Return Channel) eARC (Rear, HDMI 3) USB 2 (Side) LAN Yes (Rear) RF In 2 (Rear, RF/Sat) SPDIF (Optical Digital Audio Out) Yes (Rear) Headphone out Yes (Rear) Line out Yes (Rear, Headphone out common) Wifi Yes (802.11ac) Bluetooth Yes (V5.0) POWER & GREEN Power Supply AC 100~240V 50-60Hz Standby Power Consumption Under 0.5W Energy saving Mode Yes Illuminance Green sensor Yes Energy Standard Yes ACCESSORY Remote MR21N Battereis Yes (AA x 2EA) Power Cable Yes (TV Attached)