Microsoft Surface Pro 3 has a pixel density of:
216.33

A.K.A. Surface 3
Released: 2014

Resolution: 2160×1440 12″ display

Totaling 3.11mp (megapixels) and having a PPI of 216.33

Category: Tablet
Tags: ms, windows 8.1, microsoft, surface

Submitted by: jdhodges

Surface Pro 3

Surface Pro 3 with red Type Cover
Developer	Microsoft
Manufacturer	Pegatron
Product family	Surface
Type	2-in-1 detachable
Generation	3rd
Release date	June 20, 2014
Introductory price	US$799–1949
Discontinued	November 1, 2016
Operating system	Windows 8.1 Pro Windows 10 Pro
CPU	Intel Core i3-4020Y Intel Core i5-4300U Intel Core i7-4650U
Memory	4 or 8 GB LPDDR3 1600 MHz RAM
Storage	64, 128, 256 or 512 GB
Removable storage	microSD slot
Display	12.0 inches (30 cm) 2160×1440 (216 ppi) eDP ClearType HD screen with 3:2 aspect ratio
Graphics	Intel integrated HD Graphics HD 4200 in i3 CPU HD 4400 in i5 CPU HD 5000 in i7 CPU
Sound	Front-facing stereo speakers
Input	Built in: touchscreen, ambient light sensor, accelerometer, gyroscope, magnetometer Sold Separately: type cover, mouse, stylus pen
Camera	Front: 5 MP Rear: 5 MP
Touchpad	On the Surface Pro Type Cover (sold separately)
Connectivity	Wi-Fi 5, Bluetooth 4.0, USB 3.0, Mini DisplayPort, 3.5 mm audio socket, Cover port, Charging port
Power	Built-in rechargeable 42 W⋅h (150 kJ) lithium-ion battery 36 W proprietary external power supply with integrated USB charging port
Online services	Windows Store, OneDrive, Xbox Music, Xbox Games, Xbox Video
Dimensions	11.5 in × 7.93 in × 0.36 in (29.21 cm × 20.14 cm × 0.91 cm)
Mass	1.76 pounds (800 g)
Predecessor	Surface Pro 2
Successor	Surface Pro 4
Related articles	Surface
Website	www.microsoft.com/surface

This righthand infobox courtesy of Wikipedia.