Iron Triangle: U841A: dedicated interface of the Cisco video conferencing microphone microphone 
 Hemispherical point omni-directional interface microphone 

 Design placed on a flat surface applications, providing high-quality radio, conferences, distance learning, and other demanding sound pickup applications. 
 UniGuard? - Radio frequency interference (RFI) shielding technology offers outstanding ability to prevent RF interference, to avoid radio interference such as mobile phones are. 
 UniSteep? - High-pass filter to provide an efficient high-pass filter, the frequency attenuation without compromising the quality of voice radio. 
 Small UniPoint series of radio head, to eliminate the phase distortion, and provide clear and high-signal audio output. 
 The sturdy die-cast shell and microphone at the bottom of non-slip silicon foam can reduce the impact of the Desktop vibration microphone. 
 Flat inconspicuous design, and coated with a low reflective black paint. 
 Phantom power or battery-powered operation, when using phantom power, do not install the battery. 
 U841A technical indicators 
 Components fixed-charge back plate, permanently polarized condenser tuner 
 Direction of the directional hemispherical directional 
 Radio point of view 360 ° 
 The frequency response of 30-20,000 Hz 
 High-pass filter 80 Hz, 18 dB / octave 
 Open Circuit Sensitivity phantom power: -39 dB, (11.2 mV) re 1V at 1 Pa Battery powered: -40 dB (10.0 mV) re 1V at 1 PA 
 Impedance Phantom: 200 ohms Battery power supply: 270 ohms 
 Maximum Input Sound Level Phantom: 132 dB, 1 kHz at 1% THD Battery power supply: 122 dB SPL, 1 kHz at 1% THD 
 Dynamic Range (typical) Phantom: 111 dB (1 kHz at Max SPL) battery-powered: 101 dB (1 kHz at Max SPL) 
 Signal to Noise Ratio 73 dB, 1 kHz at 1Pa 
 Phantom power DC 11-52V, 2 mA typical 
 Battery 1.5V AA battery 
 Battery power / life of 0.4 mA / 1200 hours (typical alkaline batteries) 
 Switch off, straight, high-pass filter 
 Weight of the microphone: 78g power supply module: 139g 
 Size microphone: 65.0mm X 15.1 mm (diameter X height) power supply module: 84.0mm x 63.0mm x 22.0 mm (height X length X width) 
 The output terminal built-in 3-pin XLRM XLR male 
 AT8531 comes standard with dual power supply modules; battery; protective bag 

 OPENAV Inc.. 
 Address: Xuhui District, Huaihai Road West, 55 
 Tel :021-6074.5271 6074.5272 
 Non-working hours: 135.6416 2161 
 Web site: www.openav.cn