Pro Solar Auto Darkening Welding Helmet Arc Tig Mig Mask Grinding Mask Welder Product Description This product with low batter display,test function and replaced battery.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.Viewing Windows:92.5 × 42.5mm.response Time:0.15ms~0.2ms.retention time:0.4ms~0.8ms.delay time: 0.1S~1.2SRecovery time: 0.1S ~ 0.8SUltraviolet Protection:Less than 0.0003%(313nm-365nm).Infrared Protection:Less than 0.027%(780- 1300nm).Less than 0.085%(130nm-2000nm).Power:Lithium Battery Powered with Solar Back up(The battery can be replaced)Working temperature: -5°C ~ 55°C （23°F ~ 131°F）Storage temperature: -20°C ~ 70°C （-4°F ~ 158°F）Cartridge Size:110mmx 90mmx 9mm.Light State: DIN4Dark State: DIN9~ 13Battery Type: CR 2450Sensors: 2Sensitivity Control: Knob AdjustableIdeal for ARC/MIG/TIG/Stick WeldingGrinding Mode: Externally Controlled - Sets Lens in Permanent Light ShadePackage include:1 x Auto-Darkening Welding Helmet1 x user manualNote:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.The measurement allowed error is +/-1-3 cm. Shipping We offer FREE shipping on all orders! We ship within Three business days of payment, usually sooner. We use a selection of shipping services such as UPS, FedEx, USPS etc. We only ship to the lower 48 states, no APO/FPO addresses or PO Boxes allowed. Local pickups and combined shipping options are not provided at this time. Return You can return a product for up to 30 days from the date you purchased it. Any product you return must be in the same condition you received it and in the original packaging. Please keep the receipt. Payment We accept payment by any of the following methods:PayPalPlease pay as soon as possible after winning an product, as that will allow us to post your item to you sooner! Feedback Customer satisfaction is very important to us. If you have any problem with your order, please contact us and we will do our best to make you satisfied. Contact Us If you have any queries, please contact us via eCRATER. We usually respond within 24 hours on weekdays. Please visit our eCRATER store to check out other items for sale! Thank you for shopping at our store.