When Dell told me to visit his Manhattan office to review the 75-inch display, I didn't know what would happen. I saw my oversized display with a fair share, but I was still taken aback when I entered the room and found the Dell C7520QT covering half of the office wall.

75 4K Interactive Touch Monitor The C7520QT is a 75-inch display that supports 20-finger touch. Unlike most monitors, the C7520QT won't be placed on your desktop; instead, it's mounted on a wall or on a stand in front of an office or classroom.

75 4K Interactive Touch Monitor The C7520QT is a 75-inch display that supports 20-finger touch. Unlike most monitors, the C7520QT won't be placed on your desktop; instead, it's mounted on a wall or on a stand in front of an office or classroom.

Port And Interface

The Dell 75 4K interactive touchmonitor has a variety of ports on the rear panel.

Performance

The C7520QT's large canvas and responsive touch make it ideal for office use, but the dim and dull display can hamper the viewing experience.

Lab Testing

Dell's 75-inch 4K interactive touch display has good screen quality based on our laboratory results, but the display does not become very bright.

The display has an average peak brightness of 218 nits, making it darker than most of the traditional displays we tested. The Dell 75 4K anti-glare coating compensates for low brightness, but we really want the display to be at least 300 nits.

Bottom Line

The Dell 75 4K interactive touchmonitor features a large and sharp 75-inch, 4K screen, 20-point touchscreen support and some really useful software tools, a compelling upgrade to the office whiteboard or classroom smartboard.

What Screen Size Do You Want?

No Preference

10 to 12 inches: The thinnest and lightest laptop has a 10 to 12 inch screen around it. However, you may sacrifice the keyboard size to carry. Many of the laptops in this class are tablets.

13 to 14 inches: Provides the best balance of portability and usability. Laptops with 13-inch or 14-inch screens typically weigh between 3 and 4.5 pounds.

15 inches: The most popular size, the 15-inch laptop is the cheapest and offers plenty of desktop space. Although most 15 people are easily moved from one room to another, some are cumbersome.

17 to 18 inches: If your laptop is on your desk all day, the 17-inch or 18-inch system may provide everything you need for work and play. Many gaming notebooks fall into this size category.

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