SubZero Headset Microphone, Compatible w/ Sennheiser Wireless Systems at Gear4music
Amazon.com: Wireless Microphone Headset, UHF Wireless Headset Mic System, 160ft Range, Headset Mic and Handheld Mic 2 in 1, 1/8'' and 1/4'' Plug, for Speakers, Voice Amplifier, PA System(Not Supported AUX/iOS) :
Wireless Headsets Microphone - 30m Bluetooth - Ships Today