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[1]
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 Haswell low-voltage dual-core:[2] i3-4020Y 1.5 GHz, 3 MB cache, 11.5 W[3] i5-4300U 1.9 up to 2.9 GHz, 3 MB cache, 15 W[4] i7-4650U 1.7 up to 3.3 GHz, 4 MB cache, 15 W[5]
Memory	4 or 8 GB LPDDR3 1600 MHz RAM[6]
Storage	64, 128, 256 or 512 GB[6] (37, 97, 212 or 451 GB respectively are user-available[7])
Removable storage	microSD slot
Display	12.0 inches (30 cm) 2160×1440 (216 ppi) eDP ClearType HD screen with 3:2 aspect ratio,[6][8][9] Support up to three external displays[10]
Graphics	Intel integrated HD Graphics[2] HD 4200 in i3 CPU HD 4400 in i5 CPU HD 5000 in i7 CPU
Sound	Front-facing stereo speakers
Input	Multi-touch touchscreen[11] Bluetooth active pen, with underlying N-trig DuoSense technology,[12] with 256 levels of pressure sensitivity (included)[13] Surface Pro Type Cover detachable keyboard with touchpad (sold separately)[14] Sensors:[15] Dual microphones Ambient light sensor 3-axis accelerometer 3-axis gyroscope Digital compass
Camera	Front: 5 MP fixfocus, 1080p HD Rear: 5 MP fixfocus, 1080p HD[6]
Touchpad	On the Surface Pro Type Cover (sold separately)[14]
Connectivity	Wireless: 802.11 a/b/g/n/ac Wi-Fi Bluetooth 4.0 LE Ports: Full size USB 3.0 Mini DisplayPort 3.5 mm audio socket Cover port (proprietary) Charging/Docking port (proprietary)
Power	Built-in rechargeable 42 W⋅h (150 kJ) lithium-ion battery[6] 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 inches (29 cm) (width) 7.93 inches (20.1 cm) (height) 0.36 inches (9.1 mm) (depth)[6]
Mass	1.76 pounds (800 g)[16]
Predecessor	Surface Pro 2
Successor	Surface Pro 4[17]
Related articles	Surface
Website	www.microsoft.com/surface

This righthand infobox courtesy of Wikipedia.