The helmet features a flip-up auto-darkening lens and a separate, clear grinding shield. Flip the lens up when grinding and performing other non-welding work. Flip the lens down when welding or cutting. Flip-up Design Quick-release of front cover lens allows less lens changes, thus increasing the using time of the helmet. Self-lock at the upright position makes the non-welding work easier. Lightweight, Well-balanced Design -reduces neck torque, minimizing operator fatigue and strain leading to an increase in short-term comfort as well as long-term health benefits. Ergonomic Headgear Design provides a secure fit while avoiding major pressure points within the head, maximizing all-day wear. avoid over-tightening and discomfort in downward applications with the big size pivoting backing and multiple head straps. Clear Grind Shield -provides a clear viewing area for grinding and other tasks, reducing eye strain or other potential eye injuries. Panoramic View Shade 5.0 side windows allows a sense of surroundings. Auto-darkening Lens auto-darkening when it senses the arc rather than the brightness auto shut down 3minutes after working Characters Great For TIG MIG Stick, Plasma Applications with Grinding  Viewing Size: 3.93" X 3.23" , non-auto-darkening Side View True color view:  1/1/1/1 Optical Clarity Dark states: DIN 5～9/9～13 free adjustment(Outside Variable) View Area: 100×59.5mm mm/ 3.94 x 2.34”, side view non auto-darkening Grind Shield View Area: 10.62X5.42" Sensors to Arc: 4 Response time (bright to dark): <1/30000 seconds (normal temperature conditions) Sensitivity: adjustable Power on/off: Fully automatic Power supply: Lithium battery&Solar supply Rechargeable Lithium Battery: Rated 300mAh, 2 hours charging, can apply for 10 days. UV/IR protection: DIN 16 Working temperature: 23-131℉ Storage temperature: -4-158℉ Low voltage indicator: Yes ADF self-check: Yes Magnifying Lens: Not compatible What's Included: 1 x Auto Darkening Welding Helmet 1 x User's Manual 3 x Cover Lens, Outside 2 x Grinding Shield Len 1 x 5V USB Charge Cable (above 1A) 1 x Storage Bag 1 x Headgear Note:The headgear is default installed in the middle position. When adjusting the headgear, put both sides in a symmetrical position, or it will break down quickly.