Shure GLXD14/PGA31 Headset Wireless Microphone System w/Lithium Ion Rechargeable Battery - Audio Dynamix
Amazon.com: Bietrun UHF Wireless Microphone Headset, 165ft Range, Working Time 6H, 1/4''Plug, Wireless Headset Mic &Handheld Mic 2 in 1, for Karaoke Speaker, Amplifier, Mic Speakers, PA System, Teaching, Fitness : Musical