Counter Directional Microphone directional,monitor distance: 2 m Suit for bank counter,supermarket ... PVCDimension 30mm×30mmWeight 27gStandard CE, FCC Detail introduce:*Shouting distance directional audio surveillance mic, is special designed for business counter, ... between)*Voice clear and natural, loud sound*Adopt professional directional capacitance mic head, 2 meters shouting distance pick-up ...