The domain of the function appears to be [-128, 128]. The interval where the function displays a different behavior is approximately in the range (-1, 1).

[DESCRIPTION]: The function approximates a piecewise function. For x < 1, it seems to be a function that's close to a constant value (around 0.2). For x > 1, it appears to be an increasing function, which grows relatively fast in comparison to the constant behavior for x < 1.

