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
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Surface Pro 4

Developer	Microsoft
Product family	Surface
Type	2-in-1 detachable
Generation	4th
Release date	October 26, 2015[1]
Introductory price	$899 (£749)
Operating system	Windows 10 Pro
CPU	Intel Skylake low-voltage dual-core:[2] m3-6Y30 900 MHz up to 2.2 GHz, 4 MB cache, 4.5 W[3] i5-6300U 2.4 up to 3.0 GHz, 3 MB cache, 15 W[4] i7-6650U 2.2 up to 3.4 GHz, 4 MB cache, 15 W[5]
Memory	4 GB, 8 GB, or 16 GB[6]
Storage	PCI-Express SSD: 128 GB, 256 GB, 512 GB, or 1 TB[6]
Display	12.3 inches (31 cm) 2736×1824 (267ppi) PixelSense display with 3:2 aspect ratio[6]
Graphics	m3: Intel HD graphics 515[6] i5: Intel HD graphics 520[6] i7: Intel Iris 540 graphics[6]
Dimensions	292.1 millimetres (11.50 in) (width) 201.42 millimetres (7.930 in) (height) 8.45 millimetres (0.333 in) (depth)[6]
Weight	m3: 766 grams (1.689 lb)[6] i5: 786 grams (1.733 lb)[6] i7: 786 grams (1.733 lb)[6]
Predecessor	Surface Pro 3
Successor	Surface Pro (5th generation)[7]

This righthand infobox courtesy of Wikipedia.