"The Northern Industrial Welders Digital Triple Mode Variable-Shade Welding Helmet is developed for professional applications. A versatile digital display makes adjustments precise and easy, while an ATC circuit board offers exceptional consistency. A lightning fast 1/25,000-second switch time meets CE, ANSI and CSA standards for safety. The helmet is packed with a host of state-of-the-art specs at a superb value. Variable Shades 5-8, 8-13, Switch time sec. 1/25,000, Adjustable Sensitivity Yes, Power Supply Solar, CSE/CE Standard Yes, Battery Included Yes, 2 CR2450 coin-style, Adjustable Fit Yes, Low Battery Indicator Yes, View Area W x H in. 3 13/16 x 2 7/16, UV/IR Coated Lens Yes, ANSI Approved Yes, Auto Darkening Yes, Welding Processes MIG, Arc, Flux, TIG, Grinding, Product Type Welding helmet. Extra large 3.82 in. x 2.44 in. viewing area Variable shade features 3 modes - cutting 5-8 welding 8-13 and grinding 4, to cover all welding processes including gas welding/cutting 4 arc sensors, one in each corner, accurately detect arc light ATC circuit board produces the same shading in the center and corners Fast switching speed 1/25,000 second reaction time 4-button digital display control provides simple delay time and sensitivity adjustments 4-point ratcheting headgear Replaceable sweatband provides maximum comfort Includes extra lens Solar powered 2 replaceable lithium batteries with battery indicator and low battery alarm"