This is a great safety flashlight that never requires batteries. Since the development of LED lights, battery power last a lot longer than it used to. This makes the wind up lights like this one much more efficient. If you crank the handle for just 60 seconds this unit will give you 30 minutes worth of light.
When you press the on button once a single LED lights. This give you the longest lighting time. If you press it a 2nd time 3 LED lights come on to give you a respectable amount of bight light.
When you press it a 3rd time the 3 white lights stay lit as well as the side safety LEDs which are red. Press it one more time and then all the lights start flashing to product a distress signal that will help you get some ones attention in an emergency.
This is a very practical unit to keep in any glove box or safety kit.