For starters, box very nice with lots of interesting information. DInstalling single fan, no tools required. Two choices of assembly and each two options. 1: Installation with rigid ankles, glued to the fan housing or spaced 2mm. 2: Mounting with rubber plugs, fan glued to the housing or spaced 2mm. This system allows avoiding vibration and air whistles. I board assembly 2 with space between the fan and case. This fan is very powerful and quiet, however, for my part, it is mounted on a grid location which suddenly, heard the air flow but fortunately no whistle. No cruise control, if it is to have the possibility of choice in the trendy 5V, 7V and 12V (I chose 12v) with the supplied plug (4 pins connector input - output 3x 3 pins). You can also plugged other fans. Placed in front, it perfectly fulfilled its role with minimal noise.
