Wireless Lavalier Lapel Microphone System Mini Head Wear Mic With Transmitter For Teacher Reporter(Q7). Plug and Play Insert the wireless headset microphone into the transmitter jack, and then plug the wireless receiver into any 6.35mm (1/4 ")" microphone in "(non line in or auxiliary in) jack, such as a mixer, active speaker, amplifier, or karaoke machine.
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