Enough to Use: you will receive 20 packs of LED emergency strobe lights, adopting waterproof design, made of quality aluminum alloy housing, with heat dissipation ability; The high transmission PC lens can offer optimum protection, not easy to break or deform, can be applied in most harsh environments Easy to Install: the LED warning emergency flashing lights have 2 lighting modes, including constantly mode and strobe mode, the red wire cable is connected to the positive pole, the black wire cable is connected to the negative pole, and the yellow wire cable is connected to the positive change flashing mode; When the yellow wire touches the red wire, the mode will be changed, when the yellow wire is released, the mode is fixed High Bright LED Light: the bright LED strobe lights are designed with 6 pieces of high intensity LED chips, can improve the overall visibility, which are much brighter than the standard LED strobe lights, can ensure your driving safe during the day and night 2 Flashing Patterns: the LED strobe lights have 2 different flashing patterns, include constant mode and directional flash patterns, designed with low power consumption, fast start up speed, fast heat dissipation, adding a stylish overall look to your vehicle and making it eye catching Various Applications: the LED strobe lights are suitable for most vehicles with 12-24V power source, such as truck, SUV, pickup, off road vehicle, ATV, engineering vehicles, emergency vehicles, firefighter vehicles, construction vehicle and more