4x magnification power, Keplerian Prismatic type binocular loupe with Nickel Alloy Frame; Generous depth of field, extends the natural accommodation capability of the human eye; Adjustable nose bridge accommodates any pupil distance, adjustable inter-pupillary distance; Flip-up design and provides much more power and perfect for detailed operations such as root canals; Extra wide field of view, combined with extra deep focus range, 40mm Depth of Field, 65mm Field of View, 420mm Working Distance