When you dial 911 during an emergency every second counts. Unfortunately, precious minutes are often wasted as emergency personnel try to locate the correct house- especially at night. The Xenon flashing strobe light is visible for thousands of feet, saving rescuers precious seconds finding your location. With the emergency help lite you simply press the suction cup against a window facing the road, and turn on the switch. It can also be used to help the pizza delivery man find your house or guest if you are expecting company. The emergency help light is battery operated (Requires 2 AA batteries not included) which makes this item idea boaters, hunters, hikers, snowmobiliers, skiers, campers and woodsmen. Dimensions are 4 and one-quarter inches x 2 and five-eights inches x 1 and one-eights inches.