Humanized Design: The welding glasses are powered by solar power and built in button battery, you do not need to worry about the power You can wear it like normal glasses or it also comes with an adjustable headband that replaces the function of eyeglass legs Easy to Carry: This glasses are portable size and easy to carry, you can take it with you to you want to use Wide Applications: The auto darkening welding glasses are suitable for those who need to do electric welding, argon welding, cutting and grinding Safey Welding Way: Using the welding glasses can greatly protects your eyes from being hurt when you work and improve your work efficiency, Manufacturer: Msioytog