Features:* * Made of material, and practical to use * Suitable for most welding modes.* Delay time can be selected.* Sensitivity adjustment: you can choose according to your working conditions.* Prevent ultraviolet and infrared radiation in the whole welding process. Specification:* Name: Automatic Photoelectric Welding Helmet * Model: WS1000A* Optional Types: 1#, 2#1#:* Material: Resin * Dimensions: 110x90x9mm/4.33" x 3.54" x 0.35" (Approx.) * Visible Size: 92x42mm/3.58" x 1.65" (Approx.) * Light Condition Level: DIN4* Darkness Level: 9-13* Response Time: 1/2500S * Recovery Time: 0.2-1.0S without polarity adjustment * Sensitivity Control: Low-high non-polar adjustable * Power: Solar + Replaceable Lithium Battery * Transmittance UV: 313nm lt; 0.00006% 365nm lt; 0.00006%* Infrared transmittance: 780 - 1300nm lt; 0.003% 1300 - 2000nm lt; 0.009%* Power Adjustment: Fully Automatic * Red UV Protection: DIN16* Operating Temperature: -10 Celsius ± 60 Celsius2#:* Material: Resin* Dimensions: 110x90x9mm/4.33" x 3.54" x 0.35" (Approx.) * Visible Size: 92x42mm/3.58" x 1.65" (Approx.) * Light Status Level: DIN4* Darkness Level: 9-13* Response Time: 1/2500S * Recovery Time: 0.2-1.0S without polarity adjustment * Sensitivity Control: low-high non-polar regulation* Power: solar* UV transmittance: 313nm lt; 0.00006% 365nm lt; 0.00006%* Infrared transmittance: 780 - 1300nm lt; 0.003% 1300 - 2000nm lt; 0.009%* Power Adjustment: Fully Automatic* Red UV Protection: DIN16* Working Temperature: -10 Centigrade ± 60 Centigrade* Adjustment Button Color: Black (As Pictures Show)Specifications:Package Content(Optional):Package Content: 1:1 * Auto-Dimming Welding HelmetPackage Contents: 2:1 * Auto-Dimming Welding Helmet (Black Button)Note:1. The actual colors of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight manual measurement deviation for the data.