The ideal vision aid with wide illumination range Ideal for map reading hobby electronic & craft applications Can be battery or USB (Universal Serial Bus) powered Clamp for attaching to books tables workbenches & more Table-top stand to mount onto clip for free-standing use 165mm gooseneck adjusts the angle of the magnifying head Frameless design for extended field of vision Main aspheric lens has 100mm diameter with 2x magnification Inset lens has 20mm diameter with 4x magnification 4 LEDs to illuminate the magnifier for detailed work Simple on off switch to operate the LEDs USB power cable included Requires 2 x AAA batteries Order Code L42AL not included Weight 242g