High quality variable shade 9-13 lens manufactured and tested to BSEN379. Fully automatic switching from light to dark on striking arc. Fitted with solar power panel - no batteries required. Features sensitivity and speed controls for switching light to dark. This prevents arc eye when welding at high power whilst still providing fast switching for tack welding. Deluxe contoured helmet design approved to BSEN175 gives full neck protection and protects lens from scratching when helmet is laid down. Comfortable headband and non-slip quick release ratchet mechanism. Suitable for MIG, TIG and arc welding.