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Shure BLX Wireless Mic System with SM31FH Fitness Headset Microphone — AV Now Fitness Sound
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Samson AirLine 88x Wireless Fitness Headset Microphone System (K: 470 to 494 MHz)
Shure SM31FH Fitness Headset Microphone for Shure Wireless | Sweetwater
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Samson AirLine 99m AH9 Wireless UHF Fitness Headset System (K: 470 to 494 MHz)
Samson SWC88XAH8-K Wireless Fitness Headset Microphone System – absoluteusa
Amazon.com: Wireless Microphone Headset, UHF Wireless Mic Headset and Handheld 2 In 1, 160 ft Range for Voice Amplifier, Stage Speakers, Teacher, Tour Guides, Fitness Instructor(Do Not Support phone/ Mac/Laptop) : Musical