Applications TIG welding, MIG welding, arc welding, plasma cutting, etc Features 1). High quality LCD sheet. 2). Variable shade control, sensitivity and delay time. 3). Cartridge size:110X90mm, adapted to may different helmet shell. Model Spec.   Shade number in Clear state Din4# Shade number in Dark State Din9-13# variable (Internal regulation) Cartridge size 110X90X9mm View size: 90X40mm Switch time <1ms(Room temperature) Grind function Yes Return time Stepless regulation Sensitivity Stepless regulation Power supply Two AAA alkaline cells & solar cells Working temperature -5ºC~+55ºC UV Transmittance 313nm≤0.00006%  365 nm≤0.000076% IR Transmittance 780~1300nm≤0.003%  1300~2000nm≤0.009