Light generator self-explanatorily exactly!I will explain!when you turn round the handle on the screen,Light will shine...over!Lets turn round the handle,and be a fool!âDescriptionââManualâYou just turn round the handle on the screen.Light only shine while turning.âAutoâYou dont have to turn the handle.Its recommended for people that were tired.There are a lot of downside,but there are a few advantages,I will introduce its benefits.If she dropped her accessories in the dark...Light generator!!!Your figure turning desperately will lit a light in her heart.I cant get to sleep at night...Light generator!!!If you continue to turning,your day will never break!