BW Protable Mini Tie Clip-on Mic Microphone with Wireless FM Transmmiter Receiver Set for Teaching Conference Monitor WR-601 Mini Wireless Clip-on Microphone System, Wireless mini Microphone. Just connect the receiver to any amplifier and you can communicate wirelessly up to 20 m Clip-on Lapel Microphone free your hands Clip on Lavalier Microphone Receiver w/ 1/4" Plug Perfect wireless microphone for teaching, meetings, presentations, running a show or any where you need a hands free microphone