Amazon.com: Pyle 8 Ch UHF Wireless Microphone System & Rack Mountable Base 4 Handheld MICS 4 Headsets, 4 Belt Packs, 4 Lavelier/Lapel MIC with Independent Volume Controls AF & RF Signal Indicators (
Amazon.com: SGPRO Cordless Microphone with Rechargeable Receiver 32 UHF Channels 262 Ft, AA Batteries Cordless Mic Set to Speakers and Mixer as Singing, Talking Teaching Portable Microphone SG-13 : Musical Instruments