Detachable LED Headband Illuminated Magnifier with 5 Replaceable Lens Support Adjustable Magnifier Light Head Magnifying

Description:
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:
Magnifications--Distance to viewed objects
    1.0x--300 ~ 350mm
    1.5x --240 ~ 260mm
    2.0x --215 ~ 235mm
    2.5x --205 ~ 225mm
    3.0x --160 ~ 180mm
    3.5x --135 ~ 145mm
    4.0x --125 ~ 135mm
    4.5x --110 ~ 130mm
    5.0x --100 ~ 120mm
    5.5x -- 80 ~ 95mm
    6.0x -- 60 ~ 85mm

LED: 2
Lens: 5

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