Vibrations as measured with the device. Useful when the device is held fixed to a vehicle (e.g. on a bike handlebars), and not in a hand or in a pocket.
Cᵣᵣ ranges from 0 to 10%, default is 0.7%. If using the AutoTerrain feature, assume a baseline value for smooth terrain (lower limit), as the app will generally increase the coefficient on rougher terrain.