Large Lens, Large Field of View: The extra large 100mm/4" lens provides a wider field of view, showing more content and reducing eye strain. 10X HD Zoom :True 10X magnification, thick and transparent optical grade glass lens, high precision, wear-resistant and scratch-resistant. Display stunning images without distortion. Non-slip rubber grip: The handle is rubber. It is non-slip and will not hurt your hands. It's soft and comfortable. Thickening frame: Thickening the frame makes the lens mount firmer and not easy to fall off. The rubber frame protects the glass lenses from damage. Wide Usage: 10X HD magnification is a good choice whether for the elderly reading books and newspapers, or exploring outdoor experiences or identifying jewelry.