The module includes two sensors to generate {HEAD ~ movement data} indicative of movement direction and {TAIL ~ orientation changes} of the device 
indicative of
The module includes two sensors to generate { HEAD ~ movement data } indicative of movement direction and { TAIL ~ orientation changes } of the device
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH