Product Name: New Series Auto Darkening Welding Helmet Eyecatching Auto Darkening Welding Mask Shape: Half Mask Type: Welding Color: Black Material: PP Mask Application: Welding Mask Product Description Viewing area: 93X43mmHas the outer control and steepless control.Materials: PPDark shade range: DIN9-13Light shade number: DIN4Switching time: 1/25000s from bright to darkRecovery time: 0.1s to 0.8s from dark to brightPower supply: solar cells/Li-CellsWorking temp:-10Celcius Degree-60 DegreeViewing area: 93X43mmHas the outer control and steepless control.Materials: PPDark shade range: DIN9-13Light shade number: DIN4Switching time: 1/25000s from bright to darkRecovery time: 0.1s to 0.8s from dark to brightPower supply: solar cells/Li-CellsWorking temp:-10Celcius Degree-60 Degree