W40 AutoView 1105VXL Variable Auto-Darkening Filter, 9-12 Shade, 2.4" x 3.8"

Features variable shade, sensitivity and delay adjustments. Four independent sensors with low voltage indicator lamp. Technology allows unit to detect welds less than 5 amps. Requires 2 AAA batteries (included). Safety Headgear Accessory Type: Lens; For Use With: Any Large Window Welding Helmet; Style: Auto-Darkening Electronic Lens; Material(s): Polycarbonate.