TrueSight II Digital Variable ADF Welding Helmet, SH10, Black, 3.25 in W, 4 in LBest in Class optical clarity, with Balder Technology 3 in 1 helmets feature weld, grind and torch modes Includes four independent sensors positioned to reduce possibility of blockage during weld Sensitivity and delay adjustments for different tasks and durations Operates on two, easy to replace AAA batteries (included) with low battery indicator