On Oahu, laser guns exclusively for speed enforcement so I can get away with just using a Blinder. It detects and notifies you as it shifts the incoming laser signal. You definitely need a multi-band detector in other areas to monitor other speed enforcement equipment. Because laser is instant on, there is no way to detect it in time to react unless your detector pics up a laser signal from the car ahead of you that is being checked. Blinder is an excellent counter-measure against laser.