Datacolor Spyder3 Elite Help Manual page 43

Kelvin Slider
If your monitor has a slider (variable control) that allows setting any Kelvin value
(usually in a range like 4000K to 10000K) then your monitor has a Kelvin Slider
control.
RGB Sliders
If your monitor has three sliders (variable controls) that allow setting individual values
for the Red, Green and Blue channels (usually in a range of 0 to 100) then your
monitor has RGB Gain controls. Some monitors have six controls, three for white and
three for black:
Only adjust the controls for the white - usually labeled Gain or Contrast.
Do not adjust the controls for black - usually labeled Bias or Brightness; they are not
intended for adjustment with this tool.
Some displays have only two sliders (typically Red and Blue) with the third channel
fixed. You can still use the RGB slider adjustment screen to balance the whitepoint of
such displays by adjusting the variable channels.
Further Information
For information such as a list of Frequently Asked Questions and details on all
Datacolor products be sure to visit our website: http://www.datacolor.com/Spyder3