{HEAD ~ The electronic device} has a speaker, alarm lamps and {TAIL ~ a level meter} and can transfer data wirelessly 
{ HEAD ~ The electronic device } has a speaker , alarm lamps and { TAIL ~ a level meter } and can transfer data wirelessly
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH