Power source Main body : DC3.2~4.2V Charger : AC100-240V 50-40Hz 15W Illumination 30,000lux at 25cm working distance Zooming adjustment of light spot 50mm(Min)to 70mm(Max)spot at 25cm working distance Types of color Daylight white light (6.000kelvin) and warm white light (3.400kelvin) LED Operating life Up to 50,000hours Weight 250gm/310gm Stamdard Set Main body LED light system Head band Leather band/ Plastic band Battery pack 3 step brightness adjustment Charger Adopter / Cradle Battery Litum-ion battery 2400mA(With protection)