AT831C Mini Cardioid Lavalier Mic Unterminated Exc Power ModuleThis clip on lavalier mic AT831R provides crisp, full sounding voice pickup and excels as an instrument mic, especially for pickup of acoustic guitar with included AT8444 Instrument Microphone Adapter. It offers excellent gain before feedback and suppression of background noise. An integral 80 Hz high pass filter provides easy switching from a flat frequency response to a low end roll off. Product Features Clip on lavalier mic also excels in acoustic