Brand new and high quality.Auto-Darkening welding Helmets are designed to protect the eyes and faces from spark， spatter， and harmful radiation under normal welding conditions.Lithium Battery Powered with Solar Backup.Ample mask space and very safe structure.Suitable for high welding operation temperature.Welding or Grinding Selection.Outside shade number and sensitivity adjustable can make the operators more convenient while operating.Large view window dimension for observation easily.Right and left hander can select the suitable stile.Auto darkening lens will automatically darkens to it's selected shade number when the light from welder is detected.specification:Filter cassette size:110X90X8.2mm / 4.33X3.54X0.32inchView window size:92X42mm / 3.60X1.65inchUV/IR protection:DIN 15 or upresponse Time:0.15ms~0.2ms.retention time:0.4ms~0.8ms.Ultraviolet Protection:< 0.0003%(313nm-365nm).Infrared Protection:< 0.027%(780- 1300nm).<0.085%(130nm-2000nm).Power supply: solar cells.No battery change required.Power on/off:Fully AutomaticPacking include:1 X Welding Helmet1 x Plastic Protection PlateNO Retail Box. Packed Safely in Bubble Bag