{HEAD ~ The power} for performing the operational functions is provided by {TAIL ~ the battery} when the interface is inactive and by the host device when the interface is active 
{ HEAD ~ The power } for performing the operational functions is provided by { TAIL ~ the battery } when the interface is inactive and by the host device when the interface is active
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH