Cardioid Boundary Microphone.

With its half-space unidirectional polar pattern, low-profile design, and outstanding sound quality, the PRO 44 is ideal for conference tables, podiums, lecterns and other installed-sound uses. This versatile boundary mics self-contained electronics eliminate the need for external power modules. The PRO 44 is equipped with a wide-range condenser element with low-mass diaphragm for superior performance.

ELEMENT: Fixed-charge back plate, permanently polarized condenser
POLAR PATTERN: Half-cardioid (cardioid in hemisphere above mounting surface)
FREQUENCY RESPONSE: 70-16,000 Hz
OPEN CIRCUIT SENSITIVITY: -25 dB (56.2 mV) re 1V at 1 Pa
IMPEDANCE: 100 ohms
MAXIMUM INPUT SOUND LEVEL: 114 dB SPL, 1 kHz at 1% T.H.D.
DYNAMIC RANGE (typical): 86 dB, 1 kHz at Max SPL
SIGNAL-TO-NOISE RATIO: 66 dB, 1 kHz at 1 Pa
PHANTOM POWER REQUIREMENTS: 9-52V, 2 mA typical
WEIGHT: 2.4 oz (67 g)
DIMENSIONS: 2.87" (73.0 mm) maximum width,
3.56" (90.5 mm) maximum length,
0.59" (15.0 mm) height
OUTPUT CONNECTOR: TB3M-type
CABLE: 25' (7.6 m) long, with TA3F and XLRM-type connectors