Description User can customized fit with a special up/down, forward/backward headband mechanism, reducing fatigue of the head and neck. Sensitivity adjustment knob is located outside the helmet making it more convenient to adjust. Upon striking an arc, the filter automatically changes from clear to dark in only 1/30,000 of a second. Four optical sensors for better detection of the arc. Operator can set the delay time for the filter screen to change from dark to clear state - short, medium or long. Dual purpose welding or grinding mode. UV/IR Protection provide full protection for the userâs eyes and face, even in the light state at up to Shade 16 (DIN) at all times. Increased field of vision makes it easier to see the working parameter. Now measures 3.86â x 2.17â.Helmet is powered by high performance solar cells, and two long lasting lithium-ion batteries. ADF lens conserves power by going to standby after 5 minutes of inactivity.