Features and Benefits: External shade adjustment between DIN 9 and DIN 13 and an optical class of 1/1/1/2. Delay and sensitivity can be adjusted from the inside; Four arc sensors for higher auto darkening response; True Color allowing for a brighter view and enhanced colour definition; Externally activated Grind Button. Shade 4 Grind Mode; Delay control enabling the welder to set how long the lens stays dark after the welding arc stops.; The SAVAGE A40 helmet provides ideal functionality, performance and comfort to the occasional welder, maintenance and construction workers through to the professional welder.