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