Specifications: Optical clarity: 1/1/1/2 Viewable area (mm): 100*60 Cartridge size (mm): 114*133*10 UV/IR protection: DIN16 Light/dark state: DIN4/5-9/9-13 Arc sensors: 4 Power supply: Solar cell + replaceable CR2032 lithium battery Battery replacement: Yes Switching time: 1/30000s Delay time (dark to light): 0.1-1.0 sec. Variable, adjustable by internal knobLow TlG Amplifier: 5 Amps (DC/AC) Loop: Yes Features: *Large Screen Display with True Colors: The auto-darkening welding helmet features a large 3.94" x 3.81" display with 4 premium sensors and utilizes the latest true color technology to reproduce every detail of the working conditions. *1/1/1/1 Optical Clarity: This welding helmet features improved visibility and reduced eye fatigue by minimizing the traditional lime green color on the screen. *Ultimate Eye Protection: The welding helmet's auto-darkening feature changes from bright to dark in 1/25,000 of a second; high-quality liquid crystal and optical coatings protect against UV and IR radiation as well as glare, meeting protection standards DIN5-9/9-13. *4 Book Sensors: The welding helmet contains 4 intelligent arc sensors to adapt to different environments and task times; whether it is used for grinding or welding applications, the welding helmet is ideal for MIG, MAG, MMA and ARC welding processes.