Bijia Magnifying Glasses Head-Mounted Loupe Upgraded USB Rechargeable Eyeglass Magnifier With LED Light For Use with Both Rubber Band and Glasses Magnifying Glass with 5 Interchangeable Lenses: 1.0/1.5/2.0/2.5/3.5x I recently purchased this on Amazon. I usually use a 1.3x or 1.6x loupe when doing fine work. I am selling this because the magnification isn't suitable for me.