Teacher Wireless Microphone FM Radio Transmitter Headset Collar Tourist Guide Clip MIC Lecture Conference Microphone Set

High-concerned chemical : None Built-in Battery : Yes Diaphragm : LARGE Polar Patterns : Omnidirectional Package : Yes Communication : WireLess Set Type : Single Microphone Transducer : Condenser Microphone Use : Conference Microphone Style : Headset Microphone Brand Name : newpstek Origin : Mainland China Certification : NONE