I.Tradio audio surveillance microphone, 30sq.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 audio monitoring 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. Such as Water cube, we are respected by users around the world for an excellent sound experience with low echo & noise.

Introduction:

1.Professional wired audio surveillance & monitoring microphone.
2.Low noise, Low echo, clear speech, low price.
3.Built in digital audio disposal circuit , two step dynamic de-noise disposal.
4.Special closed circle circuit design, eliminating electronic noise.
5.High sensitivity, low noise.
6.Restraining high intensity voice automatically, protecting rear devices

7.Echo-concelling appearance design, eliminating echo in big hall.
8.0.8mm pinhole design, clear picking voice.
9.Pinhole style, little volume, suitable for jail room and other small room.

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.According with CE standard.

Parameter:

Monitoring Range  10~35sq.m
transmiting distance(shield cable)  3km
Frequency Response  20Hz ~ 20kHz
Sensitivity     -47dB
SNR         50dB(1m/40dB)   30dB(10m/40dB)1KHz at 1 Pa
Polar Pattern     Omni-directional  
Dynamic Range     80dB(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     digital de-noise

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             17 mA
Temperature     -25°C ~ 70°C
Color                White
Shell's Material     PVC
Size                 60mm × 22mm

Weight             30g
Standard          CE