Feature: Ultimate Eye Protection：Auto-darkening filter switches from light to dark in 1/25000 sec, in event of electric failure, the welder remains protecting against UV and IR radiation according to shade 16.1/2/1/2 rating meets Certified CE/EMC, GS & ANSI (Z87.1).Complies standards & ANSI Z87, 1-2003 standards. A smart choice for safety. Adjustable Settings：Our auto darkening welding helmet is equipped with sensitivity and delay settings to suit different environments and tasks. Enjoy enhanced visibility and color recognition. DIN Range: DIN9-DIN13 and the time from dark to bright state is within 0.1s to 1.0s.  Designed For Comfort：This welding helmet comes with the standard 3.64’’ x 1.67’’ clear visor viewing area, which allows the welder to see clearly at different angles.  Balanced with an adjustable and fatigue-free comfortable headgear.   Intelligent & Practical：The Auto Darkening Filter enables welders to adapt to various working environments by controlling the shade of the lens; Sensitivity adjustments from ambient lighting sources; Battery powered with solar panel technology for longer life ,utilizes high performance solar cells w/ built-in 3V lithium batteries(CR2032) as power back up.                Widely Use：Recommended to automotive, construction, and food & beverage manufacturing, metal production and fabrication, military maintenance, repair and operation (MRO), mining, oil and gas, transportation, etc.     Specification: DIN Range: DIN9-DIN13            Response Time: 0.0002MS       Retention time: 0.4ms~0.8ms              UV/IR protection: DIN 15       Power Supply: Solar with Lithium Backup                                 Operation temperature: -5 ~ 55C           Package Includes：  1 x Auto Darkening Solar Power Welding Helmet                 1 x Helmet headband