Hello, Thank you for contacting us in regards to your question. Yes, it will indeed have built in speakers. Thank you, Newegg Support

Can you mount this on the wall?

Yes, it is pretty easy. It comes without the feet attached so you just need a compatible mounting bracket. It is a light TV, so the bracket doesn't need to be super sturdy. I had one already installed for a previous TV and it worked totally fine.

how wide and how tall is it ?

Look it up online. It has the dimensions in the specs.

Questions & Answers: Samsung NU7100 50" 4K UHD HDR Smart TV

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Samsung NU7100 50" 4K UHD HDR Smart TV UN50NU7100FXZA

PurColor creates more than 16 million shades of color deliver a vibrant picture.
View stunning high-dynamic-range content with a TV designed to support HDR10+.
Experience smooth action on fast-moving content with Motion Rate 120.
Experience a greater sense of depth with optimized contrast across all areas of the screen with Contrast Enhancer.
Connect all your SmartThings devices on your mobile to control and monitor your new TV and connected devices all in one screen!

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