Features and Benefits:- Viewing Area: 3.62" x 1.36" (92 x 34.6mm)- Shade: DIN 9 ~ 13- Arc Sensor: 2- Shade Control: Internal, Variable Shade- Power On/Off: Fully Automatic- Sensitivity Control: Adjustable by dial knob - Switching Time: 1 /10,000 s. from Light to Dark. Delay (Dark to Light): 0.1 ~ 1.0s by dial control knob- Approved: ANSI Z87.1, CSA Z94.4- Power Supply: Solar cell. Battery replaceable, 2 x CR1025- Not for Laser Welding or Oxyacetylene Welding/CuttingThe standard auto-darkening welding helmet uses two CR1025 replaceable batteries for initial lens darkening and then runs off solar power or light from the welding arc. It features 2 arc sensors and a 3.62 in. x 1.36 in. viewing area. Adjust your shade control from 9 to 13. Made to fit right, it features an adjustable headgear to allow you to make it fit your way. With ANSI and CSA approval, this Auto-Darkening helmet is safe, functional, and attractive to users.