Audio-Technica U.S., Inc. Cardioid Condenser Headworn Microphone 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.
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 (typical) 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 REQUIREMENTS: 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
WEIGHT (MICROPHONE): 2.1 oz (60 g)
WEIGHT (POWER MODULE): 4.9 oz (139 g)
DIMENSIONS (MICROPHONE): 0.80" (20.4 mm) diameter
DIMENSIONS (POWER MODULE): 3.31" (84.0 mm) H x
2.48" (63.0 mm) W x
0.87" (22.0 mm) D
DIMENSIONS (HEADSET): 4.72" (120.0 mm) nominal at widest point,
3.17" (80.5 mm) flexible boom
OUTPUT CONNECTOR (POWER MODULE): Integral 3-pin XLRM-type
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 FURNISHED: AT8531 power module; AT8439 clothing clip; AT8139L large windscreen; AT8139S small windscreen; battery