Using the international advanced Ambient Noise Cancellation (ANC) environmental noise elimination technology,

 Built-in automatic identification module noise, utmost reduce the ambient noise.

 Multistage dynamic noise reduction processing, voice clear, low noise, better noise reduction degree 

 AGC automatic gain circuit make more balanced sound amplitude of the output amplitude sound playback affection is more smooth and comfortable.

 Use 3 core 0.5 mm 3 km RVVP shielded cable transmission distortion.

 Monitor head built-in lightning protection, power supply polarity reversal.

 Integrated import front audio amplifier, monitor head driven directly active speakers, DVR.

 Apply to the courts, interrogation, cell, divisions, police station, the telecommunication and bank vault, etc.

 Comply with the CE, FCC, and ROHS standard.

 Transmission distance: up to 3000 meters

 Pickup range: 10-150 square meters (can be adjusted by the built-in potentiometer,)

 The number of microphones: single microphones

 Frequency response: 20 Hz to 20 KHz

 30 db sensitivity: -

 Signal to noise ratio: 80 db

 Pointing to the features: full directivity

 Non equilibrium output impedance: 600-1000 ohms

 Output signal amplitude: 2.5 Vpp / 25 db

 The maximum sound pressure of 120 db SPL (1%), 1 KHZ, THD

 Dynamic range: 104 dB (1 KHZ at Max dB SPL)

 The signal processing circuit, DSP digital noise reduction circuit, AGC automatic gain circuit, analog Hush noise reduction circuit, the ANC environmental noise elimination technology.

 Protection circuit, lightning protection, power supply polarity reversal

 Connection mode: the red line for dc 12 v is, black line for the public, white line is for audio.

 Transmission cable: 0.5 mmRVVP 3 core shielded cable, ordinary 4 core telephone lines, five types of network twisted-pair cable

 Power supply voltage: DC regulated power supply DC 12V

 Supply current: 20 mA

 Ambient temperature: - 30 &ordm C ~ 60 &ordm C

 Origin: shenzhen,

 The supply position: spot supply

 Conform to the standard: CE, FCC, ROHS, synchronized video recording system construction specifications