SE ML7527L Illuminated Adjustable-Focus Loupe with 8x Magnification 8x Illuminated adjustable magnifier is perfect for observing details clearly Built-in measuring scale is viewable when looking through lens and can be used to measure the size of objects Pocket size, lightweight and portable for use Material: plastic body Requires 3AG10/LR1130 button cell batteries (batteries included) Dimensions: 2-3/8" x 1-1/2" x 1-3/4"