1.folding 2.touch switch ,brightness can be gradually bright or weak 3.led ... not more than 17 hours.2, the first press the switch and a LED light, the second time to press ... , the third time to press the switch small night lamp, the fourth press the switch is closed, so this cycle.3 ... When not in use, deposit three months must add electric one.2, when the desk lamp lighting light became dark, please ...