... 600W, 800WTone: 1. Monotone: Yelp, Hi-lo, Wail, Engineering, high-frequency impulse, Yelp-s. 2.Manual: Horn*4 ... +Wail, Hi-lo+ Yelp-s,Wail+ Yelp-s, Engineering + Yelp-s, high-frequency impulse + Wail. Lighting: with ... with different tone for security, fire fighting, rescuing, engineering, clearing the way, protocol, siren and aerial defiance ... for Police/ Ambulance/ Fighting/ Contruction truck sirens