An added benefit to the Sentinel helmet is that the front cover lens is replaceable within 10 seconds without removing helmet. Halo Headgear - 5 point adjustable headgear. 3.93 x 2.36 in. (100 x 60 mm) viewing area. External grind button - shade 3 grind mode.Color touch screen control panel with 8 memory settings. Solar cell and 2 CR2450 lithium batteries. Weight - 1.4lbs (22.4 oz). 3 Clear Outside cover lens. The item "ESAB Sentinel A50 Automatic Welding Helmet, BAG, TIG GLOVE, STRIKER, TIP CLEANER" is in sale since Tuesday, May 01, 2018. This item is in the category "Business & Industrial\Manufacturing & Metalworking\Welding & Soldering\Welding\Welding Protective Gear\Welding Helmets". The seller is "sixzhang" and is located in us. This item can be shipped to United States.