The present invention mainly relates to a far-end sound wave diffusion and left and right vehicle loudspeaker mounted on a police car.;The present invention provides a body (1) fixed on both sides of the fixed bracket (4, 4 ') that can be fixed to the vehicle roof in order to be able to adjust the directional loudspeaker from side to side by the switch operation of the control box in the vehicle In addition, the reverse rotation speed reduction motor 14 is fixedly installed therein, and includes a rotating body (2) capable of rotating left and right about the fixed gear (5) on the body (1), and a compression speaker device (17) The expansion tube 3 is fixed on the rotating body 2, and the rotating body 2 is driven by the driving gear 13 installed on the shaft of the reduction motor 14. 2) The intermediate gear 11 that is rotated about the shaft 12 of the bottom surface is installed to rotate by revolving the outer circumference of the fixed gear (5).
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