GREAT FOR TRAFFIC ADVISOR :This lights bar feature 4 LED modules that total of 16 high power led chips. Brighter and more effective than old lightbars, it is even visable during the daytime conditions. lifespan over 50,000 hurs. UPGRADE CONVENIENT DUAL SWITCH – Handy power switch to turn on and off, the second switch is to change between 7 different flashing patterns. Includes a 12.5 FT straight cable with a 12V cigarette plug. MULTI-PURPOSE USE: This strobe traffic advisor flashing light bar is great for emergency vehicles, volunteer service, construction vehicle, safety warning etc. Upgrade an improved lens that allows the brightness to be magnified and be seen at a greater distance. EASY INSTALLATION: come with 2 stronger suction cups, firmly mount on the smooth windshield surface.or mount with the included nuts and bolts for end ‘L’ bracket. YOUR AFTER-SALES SERVICE: If you are not satisfied with this flashing warning light bar, please feel free to contact us by ema