Features and Benefits: Protects against UV and infrared radiation Variable shades from DIN0-DIN13 Auto Darkening Lens Battery Backup Seconds Light to Dark The Titan (#TIT41266) Solar Powered (With 2- built-in 3 volt lithium back-up batteries) Auto Darkening Welding Helmet is designed to protect the eyes. Great for use with MIG/MAG - TIG and ARC welding UV/IR protection at all times. Auto-darkening filter automatically changes from light to dark in 1/30 000 of a second and dark to light: 0.25-.08 sec. The helmet also allows for a level of outside sensitivity adjustment from low to high and the viewing area is: 3.85 x 2.17.