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E.Tradio surveillance equipment microphone exclusively for CCTV monitoring, 50sq.m monitoring range, can connect directly to DVR, VCR, active loudspeaker, headphone, soundcard of PC and anywhere CCTV installed, the maximum wire transmit distance can reach 3 Km(shield cable is required), it only need 12V DC power supply. Most of Tradio surveillance equipment microphones are widely used in banks, prisons, interrogation rooms, museum, auction hall, airport hall, ICU of hospital, classroom, warehouse, hotel, big stadium etc. During 2008, our products serve Beijing Olympic Games. we are respected by users around the world for an excellent sound experience with low echo & noise.

Introduction:

1.Low noise, Low echo, clear speech, medium price.
2.blue/white coat microphone,widely voice-picking region.
3.Dynamic de-noise disposal, built in DSP processor.
4.Special closed circle circuit design, eliminating electronic noise.
5.FLAYER diffusion coat, excellent picking voice.
6.Volumn adjusting automatically (AGC), monitoring range reach 50 sq.m.
7.Echo-concelling appearance design, eliminating echo in big hall.
8.0.8mm pinhole design, clear picking voice.
9.Restraining high intensity voice automatically, protecting rear devices.
10.Long-distance transmission, the maximum transmiting distance can reach 3km. shield    Cable is required: 3 x 0.5mm2 RVVP cable, 4 core phone line, network twist line, etc.
11.Built-in over-loading protection and lightning proof circuit.
12.Pre-amplifier, directly drive DVR, VCR, headphone, loudspeaker etc.
13.Excellent voice experience, widely working temperature: -25~75°C
14.Widely used in: Police, Jail, Classroom, Army's department.
15.According with CE standard.

Parameter:

Monitoring Range  10 ~ 50sq.m
transmiting distance(shield cable)  3km
Frequency Response  20Hz ~ 20kHz
Sensitivity     -35dB
SNR         75dB(1m/40dB)   30dB(10m/40dB)1KHz at 1 Pa
Polar Pattern     Omni-directional  
Dynamic Range     104dB(1KHz at Max dB SPL)
Maximum Level Input    120dB SPL (1KHz,THD 1%)
Impedance     600ohm (imbalance)
Signal Output Extent     2.5Vpp/-25db
Microphone     Electret condenser
Special Circuit     DSP de-noise, AGC circuit

Protect Circuit     Over-loading protection, Lightning proof
Audio Preamp     Build-in
Cable             Power+, Audio and GND     3 x 0.5mm2 RVVP cable
Voltage             DC 12V (8 ~ 20V)       
Current             20 mA
Temperature     -25°C ~ 70°C
Color                Blue/White
Shell's Material     PVC
Size                 90mm × 35mm
Weight             50g
Standard          CE