Mailtank SH90 Auto Darkening Welding Goggles Filter Size 108x51x5.5mm Active Viewing Area 90x34mm Light Shade DIN3 Dark Shade DIN11 Switching Time 5/10000S Delay Time 0.2S Power Supply Lithium battery & Solar Powered Rated Capacity of Li-Battery 60mAH Arc Sensor 2 UV/IR Protection up to shade DIN 16 at all time