* Suit for bank, finance, market, jail, judicial , examination place, conference room.

* Middle sensitivity, adjustable range150m2.

* Low noise, Low distortion, mini dimension, low volume and low power waste. + Red power source -Black groundwire S-Black signal

* Working volt: 4~14 V

* Work current: 5 mA~60 MA

* Sensitivity: 200mA/ubar

* Frequency: 50~~10000 HZ

* Maximum output Voltage: 5 V-up