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Azden Single-Channel Professional VHF Wireless Hand-Held Microphone System - A4, 171.905MHz	Product Code: 211-HT/A4 Price: Check Latest Uni-directional mic with internal antenna 1/4" output jack for recording or mixer Operational range up to 300' Frequency response: 40Hz to 18KHz Frequency A3 or A4, other frequencies available by special order Includes case and AC adapter