When it comes to TVs, 4K and Ultra HD (or UHD) are referring to the same resolution. Those TVs, along with Ultra HD Blu-ray, ...
Comparison of pixel counts Here's a breakdown of the pixel counts for 1080p, 2K and 4K: 1080p: 1920 pixels wide by 1080 pixels tall. 2K (or 1440p): 2560 pixels wide by 1440 pixels tall.
The new Ring Outdoor Cam Plus watches your property in 2K right out of the box.