Black Fire Skull KLT-107 Solar Powered Auto Darkening Welding Helmet Stepless Regulation for Shipbuilding / Petroleum / Architecture / Steel / Boiler-manufacture etc. Description: Solar Powered Auto Darkening Welding Helmet is designed to protect eyes and face from spark, spatter and harmful radiation under normal welding conditions. With up to 15 degree high level UV protection, you will weld safely without damaging. Main Features: ● High strong materials and fire retardant. ● Sensitivity and delay time is adjustable. ● Permanent UV/IR protection. ● High definition protective filter. ● Response time(bright to dark): Less than 1/25000 seconds(normal temperature conditions). ● The turn time(dark to bright): 0.15s-0.8s. ● The lithium battery is installed before delivery.