GIR1 TERMS OF HEADING 8518 INCLUDES MICROPHONES. GIR6 TERMS OF ONE DASH SUBHEADING 851810, MICROPHONES AND STANDS THEREFOR. CN CODE 85181020, HAVING A FREQUENCY RANGE OF 300 Hz TO 3.4 KHz, OF A DIAMETER NOT EXCEEDING 10MM AND A HEIGHT OT EXCEEDING 3MM, OF A KIND USED IN TELECOMMUNICATION.