The 3-diopter acrylic magnifier lens enlarges 1.75 times. Magnifier lens includes built-in high power 5-diopter mini lens for additional magnification to see small details & fine print with greater comfort & ease. Versatile design includes interchangeable desk base & mounting clamp. Metal arm features gooseneck joints at base & shade for maximum flexibility in positioning. On / off switch conveniently located on base of arm. The 6 3/4" round desk base features recessed design for holding clips, coins & other sundries. Surface-mount, 5.4 watt LEDs have an average rated life of 20,000 hours. Flip up lens cover protects magnifier lens from dust & scratches when not in use. AC adapter includes 70" long cord. Magnifier / Reading. Base Color: Black; Plug Type: 2 Prong; Height: 16.75"; Width: 6.88".