Solar Power Auto Darkening Welding Helmet Welding Shield Face Mask Hood Viewing Size 3.67"X1.69" Variable Adjustable Face Shield View area: 93 x 43 mm( 3.66 inch X 1.69 inch); Battery type: CR2330(Lithium 3V) Dark state shade: 9, 10, 11, 12, 13; 5 different shade number setting in dark state for different arc light Light state shade: 4; UV/IR Protection: UP 15DIN; Auto-Darkening welding helmet are designed to protect the eyes and face from sparks, spatter, and harmful radiation under normal welding conditions. Shade control: External; Solar power; The LCD Automatic Welding Helmet with high quality is made from rugged and durable materials that ensure longevity and durability day in and day out. With the wide viewing area, it can allow you to see your weld from all perspectives. Filter dimension: 110 x 90 x 8.5 mm Note : If you have any questions about the use and installation of the product, please contact us for the freely , we will promptly reply to you