Auto-darkening helmet. 4 / 5-8 / 9-13 stepless variable shade. 3.858" x 3.425" (98 x 87 mm) view area. Manual internal controls. Four independent sensors in staggered design. Solar cells and replaceable lithium-battery. Grinding and welding modes. 1/30,000 second switch speed. 5 amps and below TIG rating. High-impact resistant nylon. Up to shade DIN16 at all times.