Network connector RJ45
4K HD Wallpaper: Network connector RJ45. Patch Cord RG-45
The 4K picture can be downloaded under CC By license from Yuri's courtesy and use in various projects or to be set as desktop background and homescreen phone if you like.
Widescreen Desktop / Macbook (Retina): 2560x1600 (fits on: 1920x1200, 1680x1050, 1440x900)
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)