● QD20 Small dome audio pickup, designed for audio monitoring, the advantages of big monitoring range and high sensitivity.
● Dome appearance, the surface design with four line lattice, better to collect environment sound within 10-80㎡.
● Internal circuit with AGC gain control and power amplification circuit, maximumly eliminate the noise, to guarantee the output intensity.
● Using directional logic dolby surround sound system, effectively reduce the high frequency and low frequency noise of environment and circuit.
● Built-in lightning protection, power supply polarity reverse connect protection, ESD protection and power protection module.
● Long audio signal transmission technology, Long audio signal transmission technology, use the RVVP3 x 0.5mm2 shield cable, it is distortionless within 3km.
● Integrated professional front audio amplifier circuit, direct drive active speakers, DVR, earphones, etc.
● Applicable to the banks, factory, schools, interrogation room, prison and any places need to monitoring.
● Gain patent certificate of State Intellectual Property Office of The People's Republic of China.
● Gain computer software copyright of National Copyright Administration of The People's Republic of China.
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