*Good quality with low price *View area:92x42mm Solar Powered Welding Helmet1),Filter size:110x90mm2),Viewing area:92x42mm3),Light shade:DIN44),Dark shade:DIN9-135),Switching time from light to dark: 1/10,000s6),Delay time from dark to light: Rapid-0.15s,Slow-0.8s7),Power supply: Solar cell+Lithium battery8),Sensitivity adjustable