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