"The Hobart Pro Series Variable-Shade Welding Helmet is a premium auto-darkening helmet with weld and grind modes. Has a variety of pro performance features you can count on for any job. Provides 8-13 variable shades and adjustable controls for delay and sensitivity. Low amperage TIG-capable. Meets ANSI Z87.1-2010 standards. Switch time sec. 1/30,000, Low Battery Indicator Yes, Power Supply CR2450 lithium battery, Welding Processes Weld, grind, TIG capable, UV/IR Coated Lens Yes, Adjustable Fit Ultra-comfort ratcheting headgear w/gel pad, View Area W x H in. 3 13/16 x 2 3/8, ANSI Approved Yes, CSE/CE Standard CE, CSA, Variable Shades 8-13, light shade #3, Battery Included Yes 2, Adjustable Sensitivity Yes, Auto Darkening Yes, Product Type Welding helmet. Largest in it's class 3.82in. x 2.36in. viewing area Superfast switching speed 1/30,000 second reaction time Auto on/off for convenience 4 independent arc sensors for reliable out-of-position applications New Ultra-Comfort adjustable ratcheting headgear with gel pad provides a great fit Accepts magnifying cheater lens not included 2 lithium batteries included and low battery indicator Comes complete with protective helmet bag and extra pack of clear protective lens covers"