Lighthouse Stamp & Coin Table Magnifier with Adjustable Arm, 2.5x MagnificationTable/ Clamp magnifier with adjustable arm.Can be clamped onto tables or other work surfaces and secured with fold-out support feet.Flexible yet sturdy metal arm. Lens diameter: 3 7/16" (88 mm). 2.5X magnification. Integrated small lens with 13/16" (21 mm) diameter and 5x magnification. 2 white LEDs.Includes 3 AAA batteries.