{HEAD ~ The larger the number} of {TAIL ~ the light focusing} means 16 are, the higher the accuracy/resolution of the mouse 
of
{ HEAD ~ The larger the number } of { TAIL ~ the light focusing } means 16 are , the higher the accuracy / resolution of the mouse
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH