Sure, here are some popular 50-inch 4K LED smart TVs from different brands, along with their key features:
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Samsung TU8000 50-inch TV - This Samsung TV features a Crystal 4K processor that optimizes picture quality and a Tizen operating system that offers easy access to streaming services. It also comes with built-in voice assistants like Alexa and Google Assistant.
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LG NanoCell 81 Series 50-inch TV - This LG TV uses NanoCell technology to deliver vibrant, lifelike colors and a wide viewing angle. It also has a Quad-Core processor and an AI ThinQ feature that allows for voice control and smart home integration.
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Sony X750H 50-inch TV - The Sony X750H has a 4K HDR processor that enhances contrast and color for a more immersive viewing experience. It also includes a built-in Google Assistant and Amazon Alexa, as well as support for Apple AirPlay and HomeKit.
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TCL 5-Series 50-inch TV - This TCL TV features QLED technology for bright and vivid colors, and supports Dolby Vision HDR for enhanced contrast and brightness. It also includes a Roku smart TV platform, which offers access to thousands of streaming channels and apps.
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Power Guard PG50F4K 50-inch TV - The Power Guard PG50F4K features Super Luma Ultra bright screen for flawless picture quality even in bright rooms, Rich Contrast, and X-Motion Clarity. It also includes a built-in Google Assistant and Alexa. The TV includes a ChromeCast operating system that provides access to popular streaming services
These are just a few examples of the many 50-inch 4K LED smart TVs available from different brands, and the specific features and capabilities will vary depending on the model and brand.