["5 Replaceable/Interconvertible lens with different magnifications marked in the middle\r\nLED light can be rotated about 60 degree and light source box with battery compartment is detachable\r\nAdjustable for head band ensures more comfortable and tight for head wearing\r\nLight source box can be used separately as lighting source after being dismantled\r\nWidely used in mechanical processing, electronic repair, jewelry appraisal, timepieces repair and miniature engraving, etc\r\nSpecifications:\r\nSingle-plate lens magnifications: 1.0x, 1.5x, 2.0x, 2.5x, 3.5x\r\nBi-plate lens magnifications: 3.0x, 4.0x, 4.5x, 5.0x, 5.5x, 6.0x\r\nMagnifications are marked in the middle of lens\r\nTable below denotes the distance proportion between magnifications and viewed objects:\r\n　\r\nMagnifications Distance to viewed objects\r\n 1.0x 300 ~ 350mm\r\n 1.5x 240 ~ 260mm\r\n 2.0x 215 ~ 235mm\r\n 2.5x 205 ~ 225mm\r\n 3.0x 160 ~ 180mm\r\n 3.5x 135 ~ 145mm\r\n 4.0x 125 ~ 135mm\r\n 4.5x 110 ~ 130mm\r\n 5.0x 100 ~ 120mm\r\n 5.5x 80 ~ 95mm\r\n 6.0x 60 ~ 85mm\r\nLED: 2 Pieces\r\nLens: 5 Pieces\r\nBattery: 3 * 1.5V AAA batteries (NOT included)\r\nfor Head circumference: Adjustable\r\nLens material: High quality PC\r\nHeadpiece material: Environmental for protection acrylic\r\nApplications: Timepiece repair, jewelry appraisal, miniature engraving, etc.\r\nColor: Black + White\r\nSize: 25.5*20.5cm/10.03*8.07\"\r\nQuantity: 1pc"]