This HDRI has a resolution of 3000/1500. It is a full spherical image (360/180).
This source light is the more realistic that you can use to light your scene without spending too much time twicking the lights settings.
The files comes with an optional Max7 scene. The scene contain a matching camera + an background image. This is very interesting as you will have an light and a background that match perfectly :)

Note that this file is free as long as you use it for a personnal project. Commercial use is not allowed !