Green mag base strobe. High intensity flashing LED beacon light. Night time visibility up to 800 meters. 20 High quality LED's gives an average of 100,000 hours (11 years continuous use) of life. Requires four AA batteries for up to 144 hours of continuous working hours.* Solid PC impact resistance lense. Rotation speed adjustable for slow to strobe and anywhere between. Two high powered magnets in base for mounting to metal surface. Mount on top of your motorhome, camper or any place and light your way back to camp. *(Batteries not included. Battery quality and rotation speed may effect battery life.)