Generic 2 LED Headband Glasses Illuminated Magnifier Loupe Single/Bi-plate 11 Magnifications 5 lens

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
Package Included:
1x Head-mounted magnifier with LED
5x Lens
1x User manual