| The police use partition wall to listen to F-999R is a high-end contact type wall ear. Its features include an ultra-sensitive copper contact microphone, high-quality loudspeakers with sound filtering and limiting functions, and improvements in the stability of the loudspeaker circuit and the durability of the board. Sound filters and limiters protect your ears from sudden loud noises and noise. The four optional frequency bands have the functions of enhancing the low frequency band and reducing high noise, enhancing the high frequency band, reducing low noise, and enhancing the sound of the listener. The product is small in size and light in weight, and has been widely used in police and security departments around the world. Products Demo Photo:
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