XTV Series auto-darkening welding helmets feature a solar-assisted lens that is internally adjustable for shade, sensitivity, and delay. Easy-to-replace, solar-assisted AAA batteries boast exceptionally long life at 2,000 hr with no recharging. In addition to plain black, XTV Series offers two bold graphic designs: Blue Flame and three-dimensional Avenger (shown). Hobart Welders• Cartridge Dimensions 4.33 x 3.54 x 0.39 in (110 x 90 x 10 mm) • Viewing Field 3.75 x 1.37 in (95 x 35 mm) • Reaction Time Light to dark: 0.00028 second (1/3,600) • Dark to light: 0.12 second • Available Shades Darkened State: #10 / Light State: #3 • Sensors Independent (Two) • Operating Temperature 23 F to 131 F (?5 C to +55 C) • Storage Temperature ?4 F to 176 F (?20 C to +80 C) • Power Supply Battery-powered, solar rechargeable • (internal, non-replaceable lithium battery) • Total Weight 1 lb (454g) • Standards ANSI Z87.1-2003/CSA • Warranty 2 years from date of purchase (see Section 7)