More information on Input Manager Properties

The current documentation on the input manager lists information about the various properties of the virtual axes: https://docs.unity3d.com/2018.4/Documentation/Manual/class-InputManager.html

However there isn't much detail on what the values of these properties can be. For example there are no stated maximum/minimum values for Gravity or Sensitivity. The documentation also says that inputs that are not sensitive to input intensity are unable to output values other than 1, 0 and -1, but through testing I have found this to be untrue.

Is there additional documentation for this? Does anyone know anything more?