FASTER AUTO DARKENING - Equipped with high-end auto-darkening lenses and four premium arc sensors, the switching time from light to dark is 1/25000 seconds. The lens brightness and sensitivity can be easily adjusted for different working environments, making it ideal for TIG/MIG/ARC welding and grinding. DIN4 on light state, DIN5-9/9-13 on dark state. LARGE VIEWING SCREEN- 3.94” x 3.66” Super Large Visible Screen Welding Helmet, featuring top-tier 1/1/1/1 optical clarity lenses and advanced true color technology, this helmet significantly enhances your visual experience, allowing you to work efficiently and accurately. LONGER SERVICE LIFE - The welding mask is equipped with two solar panels on the front and two CR2450 lithium batteries on the back, providing a working time of up to several years, with enhanced durability. BEST EYE PROTECTION - This welding hood features a 12-in-1 smart filter, with automatic DIN 16 ultraviolet/infrared protection, effectively filtering harmful light to protect the eyes and adapt to various environments. EASIER ADJUSTMENT - The welder helmet features a newly upgraded knob section, allowing for easy adjustment even while wearing gloves. The interior of the helmet has been rearranged for a better fit to the human head, ensuring comfort even during extended wear. GREEN MATERIAL - Made from eco-friendly PP materials. Tests show an operating temperature range of -5°C to 55°C, a storage temperature range of -20°C to 70°C, a tensile strength of up to 120 MPa, and a flexural modulus of up to 4000 MPa, ensuring enhanced flexibility for welding helmets. ARCCAPTAIN 3.94"X3.66" Welding Helmet Auto Darkening, 1/1/1/1 Top Optical Clarity Large Viewing Screen Solar Power Welding Hood with 4 Arc Sensor, Wide Shade 4-5/5-9/9-13 for TIG MIG ARC Welding CUT