Charges with exposure to welding or sunlight. Operation Temperature: -5 degrees C 55 degrees C. SHADE RANGE: DIN 4 / 9 - 13. AUTOMATIC, LIGHTNING-FAST REACTION & RECOVERY TIMES.
USE FOR ARC, MAG, MIG, MMA, STICK & TIG WELDING, OR PLASMA CUTTING. SOLAR RECHARGABLE, INTERNAL LITHIUM-ION BATTERY CELLS. Sensitivity knob for you to control. "Grinding" can be selective by switch. Time delay switch for you to control switching time from darkness to light. Outside darkness shade level knob.