LED surgical head light with loupes(2.5X,3.0X,3.5X,4.0X).LED power:3w Working hours:4hrs or 7hrs.

Features & specifications for LED surgical headlight and surgical loupes:

Perfect for doctor, dental and veterinary clinics, repair shops, and hobbies Adjustable foam bolstered headband, for long time comfortable wearing Multi-layer-coated premium quality optical glass elements 5-way adjustment of loupes: flip up and down, slide up and down, and slide left and right of each loupe independently Magnification: 2.5X,3.0X,3.5X,4.0XLong working distance:420mmLarge field of view: 90mm/60mm/55mm/50mmLarge depth of field:80mm/60mm/50mm/40mmOne year warranty LED clip power:3wBright Intensity:6000LuxColor Temerature:5000Kadjusting sized lighting spot:12mmworking time:4hrs/7hrsLifetime:10,000hoursWeight:400g

Definitions:

Working distance: the distance between your eyes (not the loupes) and the spot that the object is in focus. Field of view: the diameter of the area that you may see in focus. Depth of field: the range of depth that objects can be focused on, in other words, from the nearest focused section to the farthest focusted section.

Note: the actual data may be slightly different from individuals with different visions.