* Diameter of the light spot at a distance of 420mm: 20-90mm
* Illumination in 250mm working distance: =75000 1x
* Fluctuation distance: 12.5mm
* Vertical direction of Illumination:±25°adjustable
* 70g (excluding headband)
* Illumination Source: extremely bright light, 5W LED. Life 20000 hours continuous burn.
* Battery: 7.2V Lithium battery (rechargeable)
* Battery Run-time: >2.5 hours
* Voltage: 110VAC/ 220 VAC
* Maximum Power input: 15W
* Electrical Safety Standard: IEC60601.1 class II Type BF equipment.