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