It not cause damage to the eyes. When the arc light is generated, the dimming screen darken from the normal state, and when the arc light disappears, the dimming screen return to the normal state. The mirror has a scratch- coating to protect eyes. Prevent strong impact and increase lens strength. Solar powered, no battery required, high-sensitivity detection head, high working efficiency. Convenient to use: Legs can adjust the length, automatic variable light lenses and convenient, with impact resistance, the use of more secure and . Widely applications: Easy and safety to operate, light weight design; Applicable to electric welding, gas shielded welding, arc welding, electric saw, welding, etc. Colour:black Material: PP Package Contents: 4 x Welding Goggles 40 x Protective Films Only the above package content, other products are not included. Note: Light reflection 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 +/- 1-3cm.