4K HD Wallpaper: Porsche 911 Carrera
Dylan Spangler is the photographer and from his courtesy this Porsche 911 Carrera image can be downloaded under CC By-Sa license and set right from here if you like into your desktop backgrounds and homescreen phones.
Widescreen Desktop / Macbook (Retina): 2880x1800 (fits on: 2560x1600, 1920x1200, 1440x900)
High Definition HD 1080p: 1920x1080 (fits on: 1600x900, 1366x768, 1280x720)
Samsung Galaxy Tab & iPad: 2048x2048 (compatible with many tablets)
HTC, Samsung Galaxy & iPhone: 1080x1920 (compatible with many phones)