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

Pinhole design,covert installation. Head and seat are separately, head is as big as thumb.

Pinhole Style Microphone Plus

Omni Directional, Monitor Range 10-40sq.m,

Size 79mm*79mm(Seat),15mm*18mm(head)

Weight 100g, White / Black Case

Part of  customers: Lian yun gang  jail room;Beijing drug rehabilitation center etc.

Introduction:

*Professional wired audio surveillance & monitoring microphone.

*Low noise, low echo.Pinhole design,covert installation.

*Head and seat are separately, head is as big as thumb.*Built-in digital audio disposal circuit, two step dynamic de-noise disposal.*0.8mm pinhole design, precise reflecting angle of voice.

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

*Advanced echo canceling technology, successfully eliminating echo interfere.*Pinhole style, Widely used in jail room, interrogation room, visiting room.*Restraining high intensity voice automatically, protecting rear devices.*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.*Built-in over-loading protection and lightning proof circuit.*Pre-amplifier, directly drive DVR, VCR, headphone, loudspeaker etc.*Excellent voice experience, widely working temperature: -25~75°C

*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-inOutput Connetor                            Power+, Audio and Public GND   

Cable                                           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 hidden,mini head,prison/Jail room audio surveillance microphone