The sounds of 6 new interceptors with dual tone sirens. Each vehicle has two separate speakers sounding two different sounds at once. Very effective for police vehicles. As most ambulances have this feature. It's becoming more popular in the law enforcement vehicles. Especially ones Copsgear outfits. Dual tones allows highs and lows at same time which can also save lives and provide the right amount of warning to push through traffic. Allowing officers to respond quicker, safer, and possibly add seconds if not minutes to that emergency call response times.