1.large-size aluminum alloy base, give you a new visual enjoyment. 2.B11 large size aluminum alloy base, ensuring the working distance of 100mm, giving more operation possible. 3.Large caliber, wide field of vision, high-definition wide Angle eyepiece, long-term use is not easy to fatigue . 4.0.7-5.0X Continuous variable zoom, accurate gear variable hand wheel, optical magnification 7-50 times, clearer imaging, accurate feedback, more accurate zoom. 5.Configuration buckle LED light source, adjustable brightness, strong concentration, does not affect the operating space.