... can up to 500 meters .4.High efficient : With optimized circuit design , reduce power consumption , it can extend light time by ... 30% than similar product .5. Intelligence : 5 mode dimming circuit , can dimming 100% brightness , 30% brightness , 10% brightness , flashlight ... tube body .7. Compatibility : 6-18V wide voltage of circuit , equipped with a special battery cover, two 18650 batteries, ...