Microsoft Surface Pro 2 has a pixel density of:
207.82

A.K.A. Surface Pro 2nd Gen
Released: 2013

Resolution: 1920×1080 10.6″ display

Full HD (FHD) 1920×1080, 16:9 aspect ratio

Totaling 2.07mp (megapixels) and having a PPI of 207.82

Category: Tablet
Tags: ms, surface, windows 8, ivy bridge, kickstand

Surface Pro 2

Surface Pro 2 with Type Cover
Developer	Microsoft
Product family	Surface
Type	2-in-1 detachable
Release date	October 22, 2013 (2013-10-22)
Discontinued	July 5, 2014 (2014-07-05)[1]
Operating system	Windows 8.1 Pro (upgradable to Windows 10)
CPU	Intel low-voltage dual-core: i5-4300U 1.9 up to 2.9 GHz, 3 MB cache, 15 W[2] i5-4200U (Prior to Dec. 2013) 1.6 up to 2.6 GHz, 3 MB cache, 15 W.[3]
Memory	4/8 GB dual-channel DDR3-1600 (25.6 GB/sec)
Storage	64 GB (37 GB available), 128 GB (97 GB available), 256 GB (212 GB available), 512 GB (451 GB available)[4] and microSDXC card reader
Display	10.6 inches (27 cm) 1920 x 1080 px(208 ppi) ClearType HD screen with 16:9 aspect ratio
Graphics	Intel HD Graphics 4400
Sound	Dolby Digital Plus stereo speakers[5]
Input	10-point multi-touch screen, Wacom digital pen digitizer, ambient light sensor, 3-axis accelerometer, 3-axis gyroscope, compass, dual microphones
Camera	Front: 1.2 MP, 720p HD Rear: 1.2 MP, 720p HD
Connectivity	2×2 MIMO Wi-Fi (802.11 a/b/g/n), Bluetooth 4.0, USB 3.0, Mini DisplayPort 1.2
Power	151.2 kJ (42 W·h) battery
Online services	Windows Store, OneDrive, Xbox Music, Xbox Games, Xbox Video
Dimensions	10.81 inches (27.5 cm) (w) 6.81 inches (17.3 cm) (h) 0.5315 inches (13.50 mm) (d)
Mass	1.984 pounds (900 g)
Predecessor	Surface Pro
Successor	Surface Pro 3

This righthand infobox courtesy of Wikipedia.