Solar Welding Lens Shade Automatic Darkening Digital Display Welder Helmet Filter Lens 100x67mm Item Type: Solar Welding Lens Filter Size: Approx. 133 x 114 x 10mm / 5.2 x 4.5 x 0.4in Movable Window: Approx. 100 x 67mm / 3.9 x 2.6in Lamp Shade: DIN4 Dark Color: DIN5-DIN9, DIN9-DIN13 Blackout Ear Adjustment Method: External control, stepless adjustment Delay Time: 0.1-1.0S, stepless adjustment Power Supply: Solar panel and lithium battery Lithium Battery Rated Capacity: 2 x CR2450 1200mAH (built in battery) Working Temperature: -5℃ to 55℃ Welding Sensor: 4 Cover Material: PA, PP Protection Grade Aginest UVB: DIN16 Low Voltage Alarm: Yes Grinding Function: Yes Optical Grade: 1/2/1/2