40LED head lamp: a document for 7LED lamp bright, II document for 20LED bright, three document for 40LED bright, four document for 40LED flashing warning features, put three a 7th, battery, as long as battery of energy good, 7LED can continuous using 180 hours around, 20LED can bright 60 hours, 40LED bright can continuous using 25 hours, flashing can using 40 hours, General for ribbons double bubble shell suck plastic packaging, a loaded 100PCS