range UV/IR protection up to shade DIN 16 all time. Solar powered auto-darkening filter helmet. Auto switching time: light to dark is 1/30,000 Seconds. Darkness shade control (DIN) from 9-13, Clear shade 4. In conformity with CE and ANSI Z87 standards. Charges with exposure to welding or sunlight. Operation Temperature: -5 degrees C ~ 55 degrees C. face coverage. Viewing Area: 97mm x 42mm(3.80″ x 1.66″).