JS-40 HandHeld™ magnifier is a 3″ compact, easy to use 2.5x power magnifier for home, school or office. Its crystal clear acrylic lens gives you a sharp distortion-free view. This magnifier is a great low vision aid and assists in reading small print and general inspection. The JS-40 magnifier is lightweight and comfortable to use for a long period of time Lightweight yet durable for everyday usage. 2.5x Magnification. By Carson Optical  

• Lens Power/ Magnification -2.5x,5x Bifocal
• Lens Diameter - 3 Inch
• Lens Diopter - 6 Diopter 
• Lens Focal Length  7"