Full range UV/IR protection up to shade DIN 16 all time Solar powered auto-darkening filter helmet Auto switching time: light to dark is 1/25，000 Seconds Darkness shade control (DIN) from 9-13， Clear shade 4 in full conformity with CE and ANSI Z87 standards Charges with exposure to welding or sunlight Operation Temperature: -5 degrees C ~ 55 degrees C Full face coverage Viewing Area: 92mm x 42mm(3.62"x1.65")Function features: sensitivity knob"Welding"/"Grinding" can be selective by switchtime delay switch for you to control switching time from darkness to lightoutside darkness shade level knobRATCHET ADJUSTABLE HEAD-STRAP Package include: 1 x Mask