Audio-Technica MT830cW Omnidirectional Condenser Lavalier Microphone Terminated with locking 4-pin connector for A-T UniPak body-pack wireless transmitters. Power Requirements: 9 - 52V, 2 mA typical. Includes 55" (1.4 m) cable. Signal to Noise Ratio: 70 dB, 1 kHz at 1 Pa Element: Condenser