Features: Solid body material: Made of high-quality ABS plastic, this magnifying loupe is sturdy and durable, not easily broken. Features an optical lens with anti-fall and wear-resistant properties for long service life. Adjustable length: The adjustable design allows for clear viewing of uneven surfaces such as jewelry and circuit boards. Twist the upper section of the magnifier to achieve optimal focus. Easy battery replacement: Hold both ends of the magnifying glass and twist in the direction indicated on the unit to open. Inside, you will find 3 built-in AG7 button batteries. Replace all three batteries when needed. This loupe includes 3 AG7 batteries, which can last up to 8 hours. Specifications: Magnification: 30X, 60X Effective lens diameter: 30mm Dimensions: 14.81 x 13.00 x 6.10 cm Material: ABS + Optical Lens Color: Black Package Contents: 1 set x Jeweler's loupe (2 pieces) Note: Light reflection and differences in display screens may cause slight color variations between the image and the actual item. Measurement tolerance is +/- 1-3 cm.