1.easy eyes 2.four gear 3.flicker-free INSTRUCTIONS1.Plug the power cord to plug into 220V power outlet2.Open the head to the right angle3.Touch the touch power switch on the chassisFrist gear 100% brightness Second gear 75% brightness  Third gear 50% brightness  Fourth gear 25% brightnessDo not use long unplug.SPECIFICATIONSLED Color temperature:6500K(being white)/4500K(warm white)Light:240 lumensInput:American Standard 100~120V European Standard 220~240VOutput:DC 5V.1ALight Source:47pcsx0.07W LEDTotal Power:3W(mode)Temperature:0°C~40°CVolume:445x172x170mm(Fold)Life:>36000hoursREMARKSProducts can be equipped as emergency use 3 x AA Ni-MH battery or one lead-acid battery3 xAA Ni-MH battery:1100mA can use 2.5 hourslead-acid battery:800mA can be use 2 to 2.5hours