The sensing element or {HEAD ~ sensor} can be calibrated for a specific user or {TAIL ~ a group} of users 
calibrated for
The sensing element or { HEAD ~ sensor } can be calibrated for a specific user or { TAIL ~ a group } of users
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH