plug the power cord to plug into 220V power outlet open the head to the right angle Touch the touch power switch on the chassis First gear 100% brightness Second gear 75% brightness Third gear 50% brightness Fourth gear 25% brightness 4.Do not use long unplug Specifications LED color temperature:6500K(being white)/4500K(warm white) Light:240Lumens Input:American Standard 100~120V European Standard 220~240V Output::DC 5V.1A Light Source 47pcsx0.07w LED Total Source:3W(mode) Volume:445*172*170mm(Fold) Life:>36000hours