Description: Cool Robot New Pro Welding\/Grinding Helmet Auto Darkening Mig Tig Arc Mask Features: Strong materials and fire retardant,can prevent resistance,anti-aging. Definition protective filter,you can see the welding conditions clearly when weling the goods.Welding luminosity is soft and comfortable. It works the moment you start work,this products adopts advanced circuit design. Striking the arc,the observing window darkens immediately. Permanent UV\/IR protection. Fashion appearance. Ultra light designing ,wearing comfortable. High performance solar cells and lithium battery. Sensitivity and delay time can be adjustable. Grinding and weling mode can be chosen. Specification: Light state shade: DIN4 Dark state shade: DIN9-13 free adjustable(External, Variable) Response time: <1\/30,000S The return time: Adjustable: 0.1-0.8S Sensitivity control: Low or high can be selected Battery: Lithium battery +Solar cells Materials: PP Uv protection: 16 levels Operate temperature: –5\u2103—+55\u2103 Storage temperature: –20\u2103—+70\u2103 Viewing Area: 92x42mm Package includes: 1 x Welding Helmet 1 x Adjustable Headband Details pictures: