Shade Control from DIN9-13. Variable Sensitivity. Grinding Mode. Variable Delay. Full Face Coverage. Adjustable Headgear. Ergonomically Balanced to Increase Comfort. Automatic Power On/Off.The Parweld XR935H Light Reactive Welding Helmet offer's the latest innovative protection for the welder.The XR935H is both slim and lightweight in construction. Manufactured from a high impact polyamide nylon material which ensures the helmet provides high levels of comfort and durability. A curved design with a clear spatter shield over the optics provides maximum clarity. The helmet is fully adjustable to suit all head and body types. Features full neck coverage, locking headgear and automatic power on/off switch Slim and Lightweight Automatic Light Adjustment from light to dark in 1//25,000th of a second Shade Control from DIN9Variable Sensitivity Grinding Mode 3 Lightening Delay Settings Viewing Area 98mm x 44mm / 3.8T x 1.7TFull Face Coverage Automatic Power On/Off Battery Life Expectancy 6 Years UV/IR Protection up to shade DIN 16 Conforms to CE and BS EN 379:13S EN 175: ANSI Z8712 Months Warranty The auto on, auto darkening, wide view lens switches from light to dark in 1 /25,000th of a second and offers continuous eye protection against UV and IR radiation, even when the lens is in the light state mode. The grinding switch is conveniently located on the outside of the helmet. The switch locks the filter in the light state (Shade 4) to enable the helmet to be used as a grinding visor. The helmet is powered by a solar cell there is no need for external batteries or cables. Internal battery life expectancy is 6 years. The welding filter has 2 photo sensors that react independently as the welding arc is struck enabling the almost instantaneous darkening of the filter. The switching sensitivity knob is located on the outside of the helmet and allows the use of differing light levels. All Parweld filters have a Shade 4 light state, ideal for welding preparation. Conforms to European Standards