Details: JFKJ Light Therapy Lamp White & Green Light Adjustable for Mood Change [Two-color adjustable] Green and white according to your mood adjustment get rid of seasonal affective disorder. [Rotation regulation] Touch on/off turn white clockwise turn green counterclockwise. The more you turn the brighter it gets Touch on/off turn white clockwise turn green counterclockwise. The more you turn the brighter it gets the drip sound indicates that the maximum brightness has been reached. [Touch control] Smart touch design no need to click or press. [Switch indicator] After connecting the power supply the green light is on above the Type-C port. Model: GWL7 Material: ABS Plastic Wavelength: 520nm(±10nm) Narrow Band Green Light Luminance: 10 000 Lux Adapter Input: 100-240V 50/60Hz Adapter Output: 5V/2A Input Power: 3.3W Type of Lamp: Safe & UV-Free LED Include： 1* Light Therapy Lamp 1*USB to Type-C cable 1*Charging head 1*Instruction book Note: It needs to be plugged in.