The LG 55" OLED B4 (OLED55B4PUA) is a 55-inch OLED 4K Smart TV with a 120Hz refresh rate, built-in webOS 24, and support for technologies like Dolby Vision, HDR10, HLG, G-Sync, and FreeSync. It features the α8 AI Processor 4K and offers features like AI Picture Pro, AI Super Upscaling 4K, and Dynamic Tone Mapping Pro. 
Here's a more detailed breakdown:
Display:
Screen Size: 55 inches
Panel Type: OLED
Resolution: 4K Ultra HD (3840 x 2160)
Refresh Rate: 120Hz (Native)
HDR Support: Dolby Vision, HDR10, HLG
Color: 100% Color Volume and 100% Color Fidelity 
Smart Features:
Operating System: webOS 24
Smart TV: Yes
AI Processor: α8 AI Processor 4K
AI Features: AI Picture Pro, AI Super Upscaling 4K, Dynamic Tone Mapping Pro
Voice Assistant: Amazon Alexa (Built-in), Works with Hey Google, Works with Apple Home, Apple Airplay2 
Connectivity:
HDMI: 4 (supports 4K 120Hz, eARC, VRR, ALLM, QMS)
USB: 2
Ethernet: Yes
Wi-Fi: Yes (Wi-Fi 5)
Bluetooth: Yes (v5.1) 
Other Features:
Gaming Features: Game Optimizer (Game Dashboard), G-Sync Compatible, FreeSync Compatible, VRR (Variable Refresh Rate), ALLM (Auto Low Latency Mode), HGIG Mode 
Audio: 2.0 Channel, 20W Output, Dolby Atmos, Clear Voice Pro, AI Sound Pro (Virtual 9.1.2 Up-mix) 
Magic Remote: Built-in 
WiSA Ready: Yes 
Dimensions and Weight:
Without Stand: 48.3" x 27.9" x 1.8" (WxHxD)
With Stand: 48.3" x 30.4" x 9.3" (WxHxD)
Weight (with stand): 32 lbs