Parameters: Large Viewing Screen 3.94” x 3.66” Light State Shade DIN4±0.5# Dark State Shade Range DIN5~DIN9 / DIN9~DIN13 ±0.5# Shade Adjustment External control, stepless adjustment Switching Time (Light to Dark) ≤1/10000S±20% Sensitivity Adjustment Stepless adjustment Delay Time (Dark to Light) 0.1S~0.2/0.3~0.5S/0.6~1S Power Supply Lithium Battery & Solar-powered Battery Capacity 600mAh Battery Type Replaceable lithium battery Operating Temperature -5℃-+55℃ Number of Arc Sensors 4 UV/IR Protection Up to DIN13 Perfect for Welding, Cutting, and Grinding Low Battery Indicator Yes Self-Check Function Yes Advantages of Stepless Regulation: Adjustable Shade Range with Infinite Control: Easily fine-tune the darkness level with a variable shade range, offering stepless adjustment for precision control. Unlike fixed-shade helmets, this feature lets you adapt seamlessly to different welding processes and amperages—whether you're MIG, TIG, or Stick welding. Optimal Visibility and Comfort: Dial in the perfect shade to reduce eye strain and ensure crystal-clear vision of your workpiece. Infinite shade control allows a smooth transition between applications without over-darkening or under-shading, improving weld quality and operator focus. Versatile for Multiple Welding Types: Perfect for all major welding types including MIG, TIG, Flux-Core, and Stick. Whether you're working with thin sheet metal or high-amp structural steel, the infinite shade adjustability ensures optimal visibility and protection every time. Professional-Grade Customization: Whether you're a hobbyist or a pro welder, the ability to customize your helmet's shade to the exact intensity makes your setup more responsive, accurate, and comfortable during extended welding sessions.