Hot Summer Days. Ocean. Free
4K HD Wallpaper: Hot Summer Days. Ocean
From Mark Skovorodko's portfolio is this photography that can be downloaded free under CC0 license and use in social media, content marketing, blogs, desktop backgrounds, 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 almost all tablets)
HTC, Samsung Galaxy & iPhone: 1080x1920 (compatible with many smartphones)