Features: * Made of high quality material, durableand 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 throughout the welding process. Specification: * Name: Automatic Photoelectric Welding Helmet * Model: WS1000A * Optional Types: 1#, 2# 1 #: * Material: Resin * Dimensions: 110 x 90 x 9mm / 4.33 x 3.54 x 0.35 (Approx.) * Viewable Size: 92 x42mm / 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 Adjustment * Power: Solar + Replaceable Lithium Battery * UV Transmittance: 313nm 0.00006% 365nm 0.00006% * Infrared Transmittance: 780 ~ 1300nm 0.003% 1300 ~ 2000nm 0.009% * Power Control: Fully Automatic * Red UV Protection: DIN16 * Working Temperature: -10degree Celsius 60degree Celsius 2 #: * Material: Resin * Dimensions: 110 x 90 x 9mm / 4.33 x 3.54 x 0.35 (Approx.) * Viewable Size: 92 x42mm / 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 Adjustment * Power: Solar * UV Transmittance: 313nm 0.00006% 365nm 0.00006% * Infrared Transmittance: 780 ~ 1300nm 0.003% 1300 ~ 2000nm 0.009% * Power Control: Fully Automatic * Red UV Protection: DIN16 * Working Temperature: -10degree Celsius 60degree Celsius * Adjustment Button Color: Black(As pictures show) Package Contents 1: 1 * Auto-Dimming Welding Helmet Lens Package Contents 2: 1 * Auto-Dimming Welding Helmet Lens (Black Button)