function feature： 1、Luxury and generous shape,double-layer structure;using large power bulb with higher brightness,;suitable for kinds of vehicles.。 2、【Dome】Imported high-strength PC material.with excellent lustrous and high penetrating-for ability. 3、【Base】Aluminum alloy material with high strength. 4、【Loudspeaker】Install inside or outside at your option. 5、【Rotator】23W/35W excellent halogen bulb. 6、【Flash alley light】23W/25W excellent halogen bulb. 7、【Strobe light】Imported xenon tube and special controlling circuit by 5-flash mode with high efficiency and more than 10,000,000 times for using.Square,rectangular and round shape are optional. 8、【Controlling way】Separate control switch or control switch in matched siren. 9、【LED】LED long-row caution light:With the functions of high brightness,fine stability,low energy consumption,it is the ideal environment-protection product.