Answer Hello, the power amplifier audio wireless microphone belongs to the 0908 subclass of the ninth category in the trademark classification 0908 audio and video equipment sound conduit 090015, record 090016, automatic record player (music) 090062, coin activated Music device (automatic record player) 090062, tape degaussing device 090076, tape recorder 090077, magnetic tape 090078, speaker box 090087, record player pickup arm 090095, recording carrier 090111, electronic monitoring device 090151, diaphragm (audio) 090182, speaker 090190, record player 090192, record cleaning device 090230, audio tape 090231, audio and video receiver 090289, coin-activated mechanism for television set 090340, loudspeaker 090341, microphone 090351, sound transmission device 090450, recording device 090451, sound reproduction device 090452, phonograph needle 090462, needle for record player 090462, television 090468, teleprompter 090472, record player speed regulator 090486, video tape 090495, record player needle changer 090503, head cleaning tape 090535, video recorder 090536, speaker horn 090575, CD disk (audio and video) 090587 , acoustic coupler 090593, computer record player 090604, video camera 090630, cassette player 090631, CD player 090632, video cassette 090650, portable radio cassette player 090663, headphone 090671, DVD player 090685, portable media player Device 090702, digital photo frame 09071133, e-book reader 090718, baby monitor 090721, visual baby monitor 090722 ※TV camera C090033, automatic advertising machine C090034, delay reverberator C090035, earplug machine C090037, pickup C090038, CD (audio and video) )C090039, semiconductor radio C090124, learning machine C090128, electronic teaching learning machine C090129, electronic sound-generating device with book C090130