Features:
5 Replaceable/Interconvertible lens with different magnifications marked in the middle.
LED light can be rotated about 60 degree and light source box with battery compartment is detachable.
Adjustable head band ensures more comfortable and tight head wearing.
Light source box can be used separately as lighting source after being dismantled.
Widely used in mechanical processing， electronic repair， jewelry appraisal， timepieces repair and miniature engraving， etc.

Specifications:
Single-plate lens magnifications: 1.0x， 1.5x， 2.0x， 2.5x， 3.5x.
Bi-plate lens magnifications: 3.0x， 4.0x， 4.5x， 5.0x， 5.5x， 6.0x.
Table below denotes the distance proportion between magnifications and viewed objects:

MagnificationsDistance to viewed objects
1.0x300 ~ 350mm
1.5x240 ~ 260mm
2.0x215 ~ 235mm
2.5x205 ~ 225mm
3.0x160 ~ 180mm
3.5x135 ~ 145mm
4.0x125 ~ 135mm
4.5x110 ~ 130mm
5.0x100 ~ 120mm
5.5x80 ~ 95mm
6.0x60 ~ 85mm

LED: 2 Pieces
Lens: 5 Pieces
Battery: 3 * 1.5V AAA batteries (NOT included)
Head circumference: Adjustable
Lens material: High quality PC
Headpiece material: Environmental protection acrylic
Applications: Timepiece repair， jewelry appraisal， miniature engraving， etc.
Color: Black + White
Package size: Approx. 29 * 23 * 7cm / 11.42 * 9.06 * 2.76in
Package weight: Approx. 622g / 1.37Lb

Package includes:
1 * Head-mounted magnifier with LED
5 * Lens
1 * User manual (English !#!amp!*! Chinese)