2.5x 1.5x Dental Binocular Loupes Glasses Surgical LED Head Light 2 Batteries 5 Watt Aluminum Box ?Clear Image?: The excellent optical quality of the dental loupe gives yand clear imagingof the color,even in the edge of the field of view,the good depth ofures that the deepanatomy is also visible and clearly presented. ?2.5x or 3.5x to Chose? :The magnifying glass system mounted on the lightframe is easy and intuitive to operate , especially suitable for first.Magnification can be selected 2.5x or 3.5x , working distance is 320 to 420 mm. ?Ergonomic Design?: The microfiber plastic frame support system allows you to always get a comfortable , correct sitting position and work in an ergonomic way to prevent back and neck pain. Loupes are a magnification device , worn as a visual aid , intended to magnify oral cavities and operating sites . ?PD Adjustable?? Fine-tune the pupillary distance of your telescopes by rotating the pupillary distance ( PD ) knob on thehinge to adjust the distance between telescopes to align with your eyes ?Lightweight ??Lightweight batteries and Comfortable Headband design, easy and comfortable to wear. Quick of battery replacement, brightness adjustable, used with magnifiers.