This Illuminated Multi-Power LED Head Magnifier is designed for the most serious hobbyists to casual users.
Features:

• Lens magnification can be combined to increase magnification up to 3.8x
  - Fixed acrylic lens magnification: 1.9x
  - Flip acrylic lens magnification: 1.9x
  - Lens Dimensions: 3.5” x 1.125"
• Glass Loupe lens magnification: 4.5x
 - Lens Dimension : 1.25"
• 2 White LED Bulbs
• Tilt & Angle Controls for Adjusting the Light Beam
• Adjustable Head Strap with Dial Control
• Black & Grey Plastic Body
• Requires 2AAA Batteries (Batteries Not Included)