When you get on the vehicle, if you unlock it with the keyless entry function from a distance, the fog lights will light up for a certain period of time to brightly illuminate your feet in front of your vehicle. The fog lights turn off when the engine (power) switch is turned on. When getting off, the fog lights turn on for a certain period of time in conjunction with the engine (power) switch off. If you lock it while it is lit, it will continue to illuminate your feet in front of your vehicle even if you move away from your vehicle to further extend the lighting time. Lighting time can be selected from about 30 seconds and about 15 seconds. You can turn it off at will by operating the lock button twice in a row while it is on.