Sensitivity knob.<br />&quot;Welding/ Grinding&quot; can be selective by switch.<br />Time delay switch for you to control switching timedarkness to light.<br />Outside darkness shade level knob.<br />Full face coverage. Ratchet adjustable head-strap.<br />In full conformity with CE and ANSI Z87 standards.<br />Charges with exposure to welding or sunlight.<br /><br />Specification :<br />Full range UV/IR protection up to shade DIN 16 all time.<br />Auto switching time : light to dark is 1/25，000 Seconds<br />Darkness shade control DIN9-13， Clear shade 4<br />Operation Temperature : -5 → to 55  →<br />Viewing Area : 92mm x 42mm3.62&quot;x1.65&quot;<br /><br />Package includes :  <br />1 x Solar Auto Darkening Welding Helmet<br />1 x User Manual