
Upgrade your home theater with this 55-inch VIZIO M-Series Quantum smart TV. Native 4K resolution lets you experience content in rich detail, and an integrated Spatial Scaling engine improves image quality in real time. This VIZIO M-Series Quantum smart TV features Apple AirPlay and Homekit compatibility and boasts a dynamic contrast ratio of 5,000,000:1, which improves image quality with brighter whites and darker, more natural blacks.

A: The legs are about 3 inches "inside" each outside edge of the panel/screen. So, if the width dimension of the panel will fit for your stand/cabinet, the legs/feet will fit just fine (with about 3 inches to spare on each side). I added a picture to show what it is like.
Q: What is the difference between this model and the MM557-G0 model?
A: The m558 g1 is rated 600 nits of brightness and has 4x the local dimming zones of the m557, which is rated at only 400 nits. Spring for the m558 if you can; when on sale it can go as low as just $50 more than the m557. I don't think bestbuy sells the m557. Also be sure to get the 2019 model (m558 G1), not the 2018.
A: Not Bluetooth except for headphones
Q: Does the embedded Chromecast stream in 4K?
A: For youtube and vudu it does. For amazon prime it doesn't.
A: Use a optical cord connect to back of tv, connect to back of recievr switch between hdmi and optical for sound from tv
Q: Is this M series the best model
A: The best is series P, the M series is the second best... the poor is the SmartCast
Q: can anyone tell me what the distance is between the legs on this tv?
A: The distance between the outer sides of the stand legs is 42.84" and the distance between the legs are 40.32".