Dell Alienware 15 (Early 2015) - Manual (Page 20)

Specifications
Views
System
Information
Memory
Ports and
Connectors
Dimensions and
Weight
Computer
Environment
Storage
Touch Pad Power Adapter Camera
Communications
Battery
Video Audio
Display
Media-Card
Reader
Keyboard
Touch Pad
Resolution:
Horizontal 1727 dpi
Vertical 1092 dpi
Dimensions:
Height 56 mm (2.20 in)
Width 100 mm (3.94 in)