ATM75cW Terminated with locking 4-pin connector for A-T UniPak® body-pack wireless transmitters. 55" (1.4 m) cable. Includes windscreen. ATM75 With a pivot-mounted flexible mic boom that descends from either the left or right side, the ATM75 delivers professional-quality vocal pickup with hands-free operation. The belt-mounted power module operates on either battery or phantom power. Features: Professional-quality vocal pickup with hands-free operation Low-visibility headband provides stable, comfortable fit Pivot-mounted flexible mic boom descends from left or right side Belt-mounted power module operates on battery or phantom power Cardioid polar pattern improves isolation of desired sound source Also available as: ATM75cW - less power module; 55" (1.4 m) cable terminated with locking 4-pin connector for A-T UniPak wireless systems Specifications:Element: Fixed-charge back plate, permanently polarized condenser Polar Pattern: Cardioid Frequency Response: 100-13,000 Hz Low Frequency Roll Off: 80 Hz, 18 dB/octave Open Circuit Sensitivity: PHANTOM: -51 dB (2.8 mV) re 1V at 1 Pa BATTERY: -53 dB (2.2 mV) re 1V at 1 Pa Impedance: PHANTOM: 200 ohms BATTERY: 270 ohms Maximum Input Sound Level: PHANTOM: 132 dB SPL, 1 kHz at 1% T.H.D. BATTERY: 121 dB SPL, 1 kHz at 1% T.H.D. Dynamic Range: PHANTOM: 96 dB, 1 kHz at Max SPL BATTERY: 85 dB, 1 kHz at Max SPL Signal to Noise Ratio: 58 dB, 1 kHz at 1 Pa Phantom Power Requiremens: 11-52V DC, 2 mA typical Battery Type: 1.5V AA/UM3 Battery Current Life: 0.4 mA / 2000 hours typical (alkaline) Switch: Off, on-flat, on-roll-off Cable: 4.6' (1.4 m) long (permanently attached to microphone), 0.11" (2.8 mm) diameter, 2-conductor shielded cable with TA3F-type connector Accessories: AT8531 power module; AT8439 clothing clip; AT8139L large windscreen; AT8139S small windscreen; battery