Features and Specs:"9248-01 One Worker System with 50’ Hose"Good for all welding processes including TIG and TIG pulsing"ADF lens, shade 9-13"Features both optical and magnetic arc detection systems"Capability to detect light and magnetic waves that occur during welding"Optomagnetic sensors can be adjusted from zero to six feet in range"Solar powered with dual sensors"Active viewing area: 3.8” X 1.6” (9.65cm X 4.06cm)