4K HD Wallpaper: Steam Powered Cable Plow
Model of a steam powered cable plow from 1880, Landesmusem Oldenburg, Germany. The 4K photography ca be saved under CC By license from Dominik's courtesy and use as desktop background and homescreen phone.
Widescreen Desktop / Macbook: 2560x1600 (fits on: 1920x1200, 1440x900, 1280x800)
High Definition HD 1080p: 1920x1080 (fits on: 1600x900, 1366x768, 1280x720)
Samsung Galaxy Tab & iPad: 2048x1536 (compatible with almost all tablets)
HTC, Samsung Galaxy & iPhone: 1080x1920 (compatible with many smartphones)