Microsoft Surface Pro 4 has a pixel density of:
267.34

A.K.A. Surface Pro 4th Gen
Released: 2015

Resolution: 2736×1824 12.3″ display

Totaling mp (megapixels) and having a PPI of 267.34

Category: Tablet
Tags:

Surface Pro 4

Surface Pro 4 with bright blue Type Cover
Developer	Microsoft
Product family	Surface
Type	2-in-1 detachable
Generation	4th
Release date	October 26, 2015
Introductory price	$899 (£749)
Operating system	Windows 10 Pro
CPU	Intel Core m3-6Y30 Intel Core i5-6300U Intel Core i7-6650U
Memory	4 GB, 8 GB, or 16 GB
Storage	PCI-Express SSD: 128 GB, 256 GB, 512 GB, or 1 TB
Display	12.3 inches 2736×1824 (267ppi) PixelSense display with 3:2 aspect ratio
Graphics	m3: Intel HD graphics 515 i5: Intel HD graphics 520 i7: Intel Iris 540 graphics
Dimensions	292.1 mm × 201.42 mm × 8.45 mm (11.500 in × 7.930 in × 0.333 in)
Mass	m3: 766 g (1.689 lb) i5: 786 g (1.733 lb) i7: 786 g (1.733 lb)
Predecessor	Surface Pro 3
Successor	Surface Pro (5th generation)
Website	www.surface.com

This righthand infobox courtesy of Wikipedia.