Brand new 2 functions IN 1 Auto Darkening Welding HelmetSpecificationFull range UV/IR protection up to shade DIN 16 all time Solar powered auto-darkening filter helmet Auto switching time: light to dark is 1/10,000 SecondsDarkness shade control (DIN) from 9-13, Clear shade 4in full conformity with CE and ANSI Z87 standardsCharges with exposure to welding or sunlightOperation Temperature: -5 degrees C ~ 55 degrees CFull face coverage BRAND NEW ANSI STANDARD UV & IR PROTECTION SHADE RANGE: DIN 4 / 9 - 13 AUTOMATIC, LIGHTNING-FAST REACTION & RECOVERY TIMES USE FOR ARC, MAG, MIG, MMA, STICK & TIG WELDING, OR PLASMA CUTTING ADJUSTABLE SHADE CONTROL RATCHET ADJUSTABLE HEAD-STRAP TOUGH SHELL SOLAR RECHARGABLE, INTERNAL LITHIUM-ION BATTERY CELLS Function features: sensitivity knob for you to control "Grinding" can be selective by switchtime delay switch for you to control switching time from darkness to lightoutside darkness shade level knob