SENNHEISER EW 300 G4-BASE COMBO RADIOMIC SYSTEM 1x h/held, 1x beltpack, no mic, 790-865MHz, Ch 61-70
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Pro Dual Ear Headset Microphone Mic For Sennheiser EW G1 G2 G3 SK100 300 500 OEM512 Wireless Microfono System|Microphones| - AliExpress
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Lavalier Microphone for Sennheiser EW100 EW 300 G1 G2 G3 G4 Wireless Mic 757450816704 | eBay