J.TRADIO audio surveillance microphone, 40sq.m monitoring range, 3km transmission distance,water proof design, used in police

J.Tradio audio surveillance microphone, 40sq.m monitoring range, water proof design, 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 surveillance microphone 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.Pinhole design,covert installation.

3.Head and seat are separately, head is as big as thumb.4.Built-in digital audio disposal circuit, two step dynamic de-noise disposal.5.0.8mm pinhole design, precise reflecting angle of voice.

6.Restraining high intensity voice automatically, protecting rear receiving devices.

7.Advanced echo canceling technology, successfully eliminating echo interfere.8.Pinhole style, Widely used in jail room, interrogation room, visiting room.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°C14.Pinhole style, Widely used in jail room, interrogation room, visiting room.

15.According with CE standard.

Parameter:

Monitoring Range  10~40sq.mtransmiting distance(shield cable)  3kmFrequency Response  20Hz ~ 20kHzSensitivity     -45dBSNR         55dB(1m/40dB)   35dB(10m/40dB)1KHz at 1 PaPolar Pattern     Omni-directional   Dynamic Range     85dB(1KHz at Max dB SPL)Maximum Level Input    120dB SPL (1KHz,THD 1%)Impedance     600ohm (imbalance)Signal Output Extent     2.5Vpp/-25dbMicrophone     Electret condenserSpecial Circuit     DSP de-noise, AGC circuit

Protect Circuit     Over-loading protection, Lightning proofAudio Preamp     Build-inCable             Power+, Audio and GND     3 x 0.5mm2 RVVP cableVoltage             DC 12V (8 ~ 20V)        Current             20 mATemperature     -25°C ~ 70°CColor                WhiteShell's Material     Anti-fire material

Size                 79mm×79mm(seat),15mm×18mm(head)

Weight             100gStandard          CE

J. TRADIO mini head,hidden,prison/Jail room audio surveillance microphone