You need the iFeel linux kernel module from http://sourceforge.net/projects/tactile in order to use this external. The iFeel mouse uses periodic pulses to create the various haptic effects. ------------------------------------------------------------------------------ control type raw range pd range ------------------------------------------------------------------------------ strength of pulse 1-255 0 - 1 delay between pulses 1-255 0 - infinite milliseconds number of pulses 1-255 0 - infinite