my husband keep this by the bed ready to shine it into the eye of any intruder . this be not only a flash light , it could be consider a weapon . this be one heavy flashlight which could almost be use as a mini weight bar . the light turn on with the press of a button and you can adjust the light beam to focus in or show a wide beam to see you way while walk in the dark , say while camping . Doug 's review will tell you the detail , I just want to tell you how much my husband love this flashlight . do all guy love this mag-lite brand ? must be a Tim the Toolman power light thing ! for woman , I recommend the mini mag-lite , it be cute and be much lighter to carry around . you can keep it in the car or in you purse . ~ the Rebecca Review